My girlfriend and I have been together for about 3-4 months now. The things is a about 1 month ago me, her, my male friend, and her female friend decided to have a foursome. She kind of pressured me into it, I wasn't to keen on the idea but I went along with it anyway. We started doing our stuff and got a bitt drunk and I just didn't like touching her friend or my friend touching her so I got up and left. She started being rude to me and they carried on without me. The next morning I found out that she gave both the male and female friend head while I wasn't in the room, I got pretty angry because all I did with the other chick was finger her before I left. She obviously knew that when I stormed out I was not okay with the idea. Anyway her excuse to all this was that she was drunk. We talked about it and I told her I didn't like the idea of her kissing other chicks and all, I told her that I see it as "if it isnt me, its cheating". She said she understood and said she wouldn't do anythng of the sought again... to this day I still get cut up about it, just thinking about what happened that night.
Anyway just the other weekend we were on our way up to the clubs (her, me, and about 4 other friends) when I started feeling really sick because I drank too much, so I decided to go back to the apartment, she carried on without me... next morning I find out that she had kissed this girl, twice.. she knows how I feel about it... wat do I do?