Hey everyone,
I need help, I don't know what to do. Or whether I should do it.
Me and my girlfriend were together for 2 years, we always talked about how we were going to get married and have kids. We both loved each other very much.

But last week, she kissed a guy. WHO I HATE, right after a argument we had. After she went to a party (without me going),she just said that she wants to go on a break for a while. Out of the blue. A week goes by, and on a Saturday night, she says that she is going to another party. All I say is "call me when your in, so i know your ok". She didn't. So I called her. Very short and sweet. I'm home. So I decided I would go around to see if she was OK. I caught her having sex in the back of her car. With the same guy she kissed the other night. I was so gutted. It was thee most horrible thing ever. But I still loved her. I still wanted her back. So I said that I am willing to forgive and forget. And we started talking. Only for her to tell me that she cheated on me with another guy whilst we were still going out. I was disgusted in her and myself. She said "its nothing personal". Pfffft. But yet, I still call her and text her. When we did talk, she promised me on her mum's and sisters life that it would never happen again, but she doesn't know if she wants to get back with me. She keeps saying that it happened because she was confused.
And then today, her Facebook page was still logged into my comp. so I looked at her chat history. She has been talking to the same guy she had sex with at the party. Guy, and said " you know i'll come back for more."

I can't sleep, thinking about it. I'm not eating correctly. I've lost a stone. And I want to run and jump off a bridge. This has hit me hard. Someone please help.

Sounds like you keep banging your head on the wall. When are you going to stop? Get a hold of yourself. She's cheating repeatedly. How can you ever trust her ever again?

Go into strict no contact so that you can focus on healing. Check out the threads concerning no contact in my signature.

Dude, your love is wasted on this lying cheater and her confusion is just an excuse. None of that matters, though, just what you do about it. I highly suggest you cut her from your life forever, and forget past promises or whatever else she told you to keep you blind to the truth. It was a LIE! All of it.

Now that your eyes are open, get rid of her.

I'm sorry you've had to experience this kind of pain, but the good thing is that now you know what kind of a woman she is.

She's a Slutty McSlutterson, & she played you because it was convenient for her. I completely agree with the others: cut her out of your life. She's just a cancer that will continue to make you miserable unless you treat it with some good 'ol No Contact.

Yeah, really difficult though, she literally lives 5 minutes from me, her friends are my friends, we work in basically the same place, and she's always on Facebook.
Really difficult. I worry about her and stuff.
I know its not helping me.

First off, DELETE HER FROM FACEBOOK.
Keeping her on Facebook & looking at her status updates is like shooting yourself in the face every time you go on the computer. Trust me, deleting her will make you feel better. I had to do it with my ex, & I'm glad I did!

Second, find new friends.

You can't control where she lives, or what she does, but you can control what YOU do & how you want to heal. If you don't want to heal, don't avoid her, or delete her from your life. If you do, listen when I tell you that while it may be difficult to erase her now (or as much as you control), you'll be thankful when you're a few months down the road feeling like you're yourself again. Good luck.