^^ okay, if the girl I was seeing made out and got a hickey from another guy, and claimed that she thought it was me, I would dump her straight out of the sheer stupidity of what she just told me

Ditch the bitch. That excuse doesn't fly. Plenty of people keep their heads on when they want to do something with someone else, but don't. I know I've passed up many an opportunity and so have girls that I have dated when they were with me.

It doesn't matter what the story is, the point is she still did what she did. Sure she saved some portion of trust by telling you, but its pretty much ruined. And I can vouch for this because I've been in your position before - I was dating a girl for almost 2 years and she went out with some friends to 6Flags, one of them being her ex, and they ended up making out. She felt horrible and told me, and for a week I wasn't sure what to do, to forgive and forget or to let her go. I decided it was time to let her go and date other people. Ironically, the next relationship after her was the best one I've had yet.

If you're young ( as in 24 and younger ) - don't let a break up hold you down so much unless its been a long time, and 6 months isn't something that you should cry about. Ditch the bitch, and go have some fun with the guys - thats what I did