Well we've been dating for 5 months now. I'm just having trust issues with her like. I trust her.. but then something comes back and makes me think. I love her and I know she lives me but we're having multiple issues here. Last night, she broke a promise to meand went out and tried smoking. I was pissed completely and she told me not to make a big deal. I apologized in the morning and told her I just don't want her to f*** up her life and get addicted.
There's also this guy.. I guess we could call him a manwhore. Him and her are best friends and I worry about what's going on when I'm not around. Its not her I don't trust its him.. this guys real pushy about it.. and I don't want stuff going on behind my back. If I ask her or talk to her about it she'll freak out. How do I know if she likes him or if they've done anything at all?

Your issues are yours to deal with, not only trust, but your own insecurities. What are you going to do confront her, or worse spy? It's the guy and his reputation that has you wondering. Does your g/f do anything to make you feel this way?

Yeah. She's like really friendly. Not sexually or even touchy just how she talks... shes like that with everyone though... kinda bugs me.. im usually over it.. but this kid.. my god he just pushes me.. I don't know why. I don't spy.. but I'm told things by people which I do confront her about (these are things from people who hate her and there dumb things like they watched a movie last night which I don't care really) which she does tell me truths about. Nothing did happen though. I do trust her... I just don't know