So I need some help here. Some good solid advice... It would be helpful in my time of confusion. I will tell you all I know and I hope someone can help me. This may be very long...

I am 22 years old. My, uh, girlfriend is now 19. We met 2 years ago this summer. We liked each other since the moment we looked at each other, and immediately started dating. Throughout our first few months of dating, things began to get really serious but we both liked it and mutually agreed to go further with our relationship. Times were good. She loved me - a lot - and I returned the favor. This was my first relationship, and the first time a girl ever returned my love. Eventually, after a few months, we began to have sex. She was my first, but I was her second. Before me, she was in a relationship with a guy whom never really cared much for her, often ignoring her to play video games. She dated him for 2 years before she finally called it quits. With him, she was basically in a high school dating thing. It was all drama and no passion. She even told me she hated ever having sex with him because he would hurt her during sex and not care.
Now, when she started dating me, from what her family and friends tell me, I made her a better and happier person. She had a tough child-hood with her mom and dad splitting and then her dad re-marring and moving from one province to another and having 5 other siblings... her child-hood was filled with anger and betrayal, and she wasn't loved as much as she should have been. And I believe part of her reasonings today have to do with her troubled past...
All right, within 3 months of her and I being together, she slowly began moving in with me. She hated living with her parents and family, so it became almost an easy choice for her. I didn't mind, and in fact, it made us grow closer being around each other more than usual.
So then the big bombshell happened: after 5 months of being together, she got pregnant. Now, I don't know how to explain this to people, but we new the consequences. We knew that by not wearing.. protection, that we were risking having a child at a young age... but being young and stupid and in love, we figured, who cares? We accepted it, and if it was to happen, then we would have a family together. When she told me she was pregnant, we were legitimately happy. We told our parents, friends, family - you name it! We were excited. Throughout the next 9 months of the pregnancy, all we did was think of our baby. We discussed names, bought baby stuff - all the things any normal couple would do when expecting a baby. It was a scary time - but a great time. I had zero knowledge of babies and so did she, but we were in this together and I felt I could do this. We grew massively closer together throughout this time. Mind you, there were the odd times when emotions got the best of her and she felt I would leave her... but all I did was re-assure her that I wasn't going anywhere and she loved me for that. I was by her side the entire time she was giving birth, and cried by eyes out when our son was born.
The next 4 months were great. We moved into my parents house and had a huge area to live with the baby. Those 4 months at my parents house were great, but my girlfriend started to change a little bit. I was only working about 30 hours a week at a part-time evening job while looking for something full-time. We didn't necessarily NEED the money, as my parents only charged us $300 for living with them - and that was nothing. But she started to feel that she didn't want to live with my parents anymore, she wanted and desired her own place with her own rules. My parents were fine and didn't care what we did, my girlfriend I guess just got tired of living with parents. Before we moved out, my mom offered her a job at the daycare she owned and a free college course to go along with it. My girlfriend was just handed a career on a silver platter, and she was so happy! I didn't mind any of this, as I would be relegated to being the stay-at-home dad, and told her I'd do whatever makes her happy. I wasn't finding any full-time job, so for her to get this now really helped us out.
So 5 months after our baby was born, we moved in with her friend. Yupp, her friend, whom I told her I didn't really like. But you know what? I did it for her. After about 2 months living with her friend, my girlfriend came the realization that I was right and her friend was a freak with money and bills, so we moved out of that situation. We found a new place, but it was further from her work. She had no vehicle so she relied on me to drive her to work or wherever she needed to go. We knew the consequences of living so far away from our jobs, but we did it anyway. We talked about it, and just decided to try and prove to ourselves that we can overcome anything. In between moving, we decided to stay at her parents house for 2 weeks until the new place was cleaned out. It was good for her, because she managed to re-build her relationships with her father and step-mom.
Then we moved in to our new place, oh, about 5 and a half months ago and that's when things started to go downhill.
Her job began to get stressful, along with her course at college. She dropped out of grade 12 high school, so I always figured it'd be really tough for her to just jump into college. She could just never sit there and listen and learn from a teacher. That is why she left high school. But she still kept going with it, and I admired her for it. She was doing it for me and Jack and all I could do was love her and help through it. As she worked full-time, I stayed at home and looked after Jack while working part-time during the times when she was off. For awhile, it seemed to be her coming home from work, and I was leaving for work. It started getting stressful because we wanted to spend more time together. It began to get her upset and cranky, and resulted in her demanding me to get a full-time job and Jack would start day-care. So, naturally, I began to look for a full-time day job - similar hours to her's. And, naturally, that proved difficult, and in her eyes made it seem like I was not trying or putting any effort into it... But I was. I wanted nothing more than to make the same amount of money she was making AND get to spend my time off with her and our son. But it was going to take time to find a better job, and this frustrated her. She just slowly started to feel that she was paying for everything and that she wanted money for herself sometimes. When she turned 19, she felt she needed to get out and experience the bar-scene. I was fine with that, and on occasion went out with her. The bars are not my thing, so I didn't go out all the time. I trusted her, and I knew she would never cheat (she never did cheat, btw).
So for the 5 months of living in the new place, she started slowly getting stressed out with money. That was on top of working her first full-time job - at a daycare - and going to college, and having a baby. While she did all the career things, I looked after our baby every day while she went out to work and school. I would have rather it be me who found the full-time job and went to school, but she was offered all this for free and it was too good to miss. This is the way it happened, and I know deep down she wishes it was I who had this opportunity and that she got to stay at home and raise the baby...
So while all this was going on, she abruptly ended having sex with me. Every time I went to kiss her, she would eventually back off and say she just can't have sex anymore, that her "sex-drive" was just gone. She said she lost the desire to have it a little after our son was born. She still was attracted to me, but didn't ever feel like having sex. This somewhat hurt me, but I felt it was normal and that eventually she would get back into it again. After all, she is only 19, isn't that when human beings are in their sexual prime? I'm not saying all I care about is sex, but it did seem a bit fishy to me. Regardless, I loved her and thought it was just stress getting to her.
So now all this brings me the events today. The last month she began to text and flirt around with her guy friends. Not trying to get with them or anything, she says, just because she liked the way it felt when they flirted back to her. I trusted her, and let it go on. I didn't care because she kept re-assuring me that she loved me and she'd even tell me some of the stuff theyd say to her. But then she began to delete all her conversations whenever I was around. When I asked her why, she would just say things like, I do the same thing, or she didn't want me reading them... well, what the hell was I going to think now? It began to make me very paranoid. I was scared, I felt she was going to leave me for someone else. I thought she WAS cheating on me. Every time I'd confront her about it, she would just re-assure me that was not cheating and nor did she want to date anyone else. I wasn't buying it. I logged onto her Facebook on day and found she was having a conversation with one of MY friends, and I found out she was texting him some pretty sexual things one night when she was out at the bars drinking. It was pretty heavy flirting, and just reading the conversation got me fuming mad. So I confronted her about it all, and she just simply said: "We're over".
A massive argument ensued and all I wanted to know from her was what happened? I get she was stressed from a lot of things, but its not reason to go flirting around and then break up. Eventually, she just said she wanted a break from having any sort of relationship. She just wanted to be single and NOT looking. She just wants to hang out with her friends and think her life over. She doesn't know if she ever wants to get back together with me, but she says she loves me and wants to eventually start dating all over again. It just seems so wishy-washy and it's confusing the living hell out of me. She just all of a sudden... changed. It's almost as if everything that happened in the past 2 years just hit her all at once and she got really scared of being "stuck" in a rut the rest of her life. I know we definitely moved quickly in our relationship, and I get if she needs space.. I just don't know what to do or think. I don't want to be clingy and push her away, but I don't want to avoid her or go away, because that won't solve anything either. Trying to find that balance is tough. She still wants me to live with her, so we are still under the same roof. She says she still loves me, and she says she wants to presume dating. She actually said last night that she knows what our first date could be... and then she tells me she doesn't know if she wants in a relationship again...
I'm confused as hell, and I just simply don't know what to do. I love her, and I've always been good to her, so what do I do? I don't want to sit here and wait, and hope she eventually realizes that she does want to be with me... because if I commit myself to her and she realizes she wants nothing to do with me anymore, I'd feel terrible and depressed. I don't want to feel like this anymore, all I want is our family to be normal again. I want to help her and be there for her. Hell, I even bought an engagement ring a while back and was going to ask her to marry me..
I just need some help and clearance. Has anyone ever had to deal with a person like my girlfriend? I get she had a troubled life before me, but I truly made it better for her.. or so I thought. She's told me on countless occasions that I made her the happiest she's ever been, so why does she feel the need to throw this all away? She has a loving family she can be with for the rest of her life.
What should I do, and how should I act to get her back? I don't want to lose this woman. I feel and know she is the one.

Sounds like you are going through hell :S

I have no expertise in this field, and I am only a teenager. But I will try my best.

It is normal for girls her age to want to 'experience new things', in fact, you should also be doing the same thing. But since you have a baby now, it complicates things to a whole new level. By breaking up with her, you are making Jake grow up in a broken home. I see a cycle, what has happened to your girlfriend's past is going to be Jake's new problem.

I suggest talking to her about this issue, I mean, you both are the rightful parents and are obligated to give Jake the fair life he deserves. Even if the way he entered life might not have been the best way.

I don't know about other people, but I support you guys staying together... But if worse comes to worse, as in if the environment you and your girlfriend are giving Jake is only making things worse. Then consider separation and letting your own parents take care of Jake, while you try to get a hold of your own life by getting an education or starting a career. Who knows down the road you and your girlfriend might reunite and become the parents Jake deserves.

I appreciate this answer.. If we did not have a baby, this situation would be a whole lot easier for me: I would just pack my things up and leave her alone. That's what I WANT to do. But yes, having a baby makes this extremely more difficult.. I have worked something out with her in the time being: I will be staying with my parents every single weekend and we will alternate the baby. I will take him with me this weekend, she will have him all to herself next weekend. This way, I believe it will do one of two things: She will realize how damn difficult it is without me there to help her, or she will thrive in the situation and realize that she doesn't need me anymore. Instead of living with her for the next 10 months, this scenario will give her the perfect view of the life she thinks she's missing out on. If she wants to be the party-animal/explore-the-world kind of person, then so be it. I don't know what way she will choose, but she will find it hard to raise a baby alone.

The best thing you can do right now is go back with your parents for a while with your son, and let her have frequent visitation with him. This will make you both realize exactly what you want. It will feel like a relief your not living together or you'll be missing each other.
It is normal for her to want to explore, because she didn't really get to. But her feeling like she's losing you, and then the feeling you're not there might really make her wake up and realize that you ARE such a great guy, and that she loves you and doesn't want to live without you. Or, it could make her realize that she doesn't. It's better to do this instead of staying in the same place until you guys blow up at each other and do some unrepairable damage. Don't put each other there and don't put your son there. It's better to know and adjust early in his life than to fight and do permanent damage to him until a few years from now. I'm a victim of this, and so was my father. We blamed ourselves for years because we have memories of it.
Best of luck to you. Live for your son first. And let her have her desired space.