<human>: My Gf and I started dating our senior year of high school.  When college came around we decided we wanted to stay together and make things work.  We're about an hour drive from each other now.  This past weekend I went up to visit her.  She got drunk in front of me for the first time.  It turns out she is very flirtatious when she drinks...just not with me.  Later that night she confessed to cheating on me since she's been up there. 

She assures me it was only one time.  She said both her and the guy were drunk and she remembers making out with him but doesn't think anything else happened. She seemed genuinely sorry and guilty and said she still loves me.

I love her to death and so I forgave her and let her know how hard that was on me.  We talked about how things need to change, like she probably shouldn't drink a lot or any at all.  I told her she has one more chance and basically the ball is in her court for the relationship to work now since I've done and am doing everything I possibly can.

Now a few days later, I'm not okay.  I've cried a lot since it happened and am very scared of losing her.  She's first girl that I think could very well be the one.  It is so much harder to think that after what I saw and learned.  We both want to make things work but she doesn't understand how I'm feeling right now.  I know what she has to be going through must be horrible as well. I'm just unsure as to what I'm supposed to do.  As of right now it seems as if she is just forgetting this past weekend entirely and going back to how things were just prior to that.  Which I'll admit weren't very good, mostly on my side.

What am I supposed to do in this situation?  How do cope with what I saw and learned? Is there anything useful or helpful I could do?

Can you give me the gist of the text in a nutshell?
<bot>: My GF drunkenly cheated on me. I forgave her and we're trying to fix things.  How do I cope with what happened and what am I supposed to do?