<human>: My girlfriend and I had been dating for 4 years, and living together for 3. Last weekend we got in a fight, and then she got really drunk and slept with a random guy she met at a bar She admitted it to me the next day and I moved out to stay with a friend.

She has been calling and texting me non stop about how sorry she is. I truly did love her and am so heartbroken. Part of me feels like my pride is getting in the way of getting back with her, but part of me feels like getting back with her would just be the easy thing to do, not the right thing.

I don't know if I could ever truly trust her again. I know we will have future fights, and I don't know that she wouldn't cheat on me after one of those. At the same time, I do honestly believe she is really really sorry and that she was acting rashly under the influence of anger and lots of alcohol. 

I'm feeling so hurt and so lost. I feel like I'm the bad guy because I'm the one turning her away and I don't know if thats the right decision.

Can you condense the text into three sentences or less?
<bot>: My girlfriend got super drunk after a fight and slept with a random guy she met at a club. Now she is sorry and wants me back. I don't know what to do.