Here's the situation - I've been going out with this girl for almost a month, and it's been going well. Last Saturday she had a girls night with some friends of hers. They got very drunk and partied. I found out later, from one of the others, that she made out with one of her girlfriends. At first I didn't mind, and I knew she felt bad about it, but I haven't been able to get it off my mind. She's not bisexual, and I know it didn't mean anything, but it still really bugs me. I know it was just them joking around, but at the same time I can't help but get the feeling that she cheated on me. We're both monogamous, and that's the way we like it, and I also have a belief that if somebody cheats on me then it's done. I just don't really know what to do with this right now, because I really like her, but I'm also angry, and then there's some other stuff that I'm not getting into. Basically I'm extremely confused and conflicted, and I'm looking for some advice from some of the well-balanced folks on this site.