I don't know what to do my girlfriend told me she didn't feel the same about me but I'm not buying it really I think she just needs some time away but I just can't do it I feel nothing when I don't have her in my arms. I'm 20 she is 20 we have a 2year old girl I want things to work out for our kid but also because I love this girl with all my heart I just been a **** the past few months. What can I do to get her back to me..

All you can do is give her time..

Best advice I can give you is, forget about this girl and try to start your own life again.
You can't trick somebody back to you, ONLY thing you can do is give her time, and if she wants to be with you again, she will come back, by herself, not you.

And also, start NC (no contact) with her(as much as possible, proberly hard when there's a kid involved).
But the more you start focusing on yourself, the happier you will be and over time you will be forgetting about the pain and hurt, that you might be feeling right now.

Go to the gym, start working out - it really work wonders, hang out with friends and family, avoid speaking about her to anyone. If your on Facebook or any other online site where you can check up on her, delete it or remove her..

You don't have to get her back. She is the mother of your child so you will be tied together for a long time to come.

You have no choice but to give her time, but don't let the relationship floundering make you any less of a dad than you are. Matter of fact, be a better dad. That's the important thing whether you get her back, or not.

If she really loves you and just needs time, then this will work itself out. You have a child together so you will both be around. Do NOT push yourself on her. Just let the situation flow naturally. You obviously have strong feelings for her, just be there when she needs you. . And try not to be a **** ;)