How can I start to trust him or am I overreacting?

Just hearing your story..i have this gut feeling he isnt being 100% faithful to you. If he has to go out of state to party, thats just saying it all right there. Why wouldnt he consider taking his gf, and showing her off?

Hun> You know what to do, and im not going to say whatever you want to hear! Your bf sounds ALOT like my ex! And his gf sounds ALOT like you. He has cheated on her, numerous times..and i have told her, but she believes HIM of course. She is very naive/insecure! Because we dont like each other, she said she doesnt believe me. I know for a fact that he has cheated, because, 1.>i was his first victim, and 2>he told me he cheats on her alot. No matter how i feel about her, i felt like she should know. I did my part..if shes dumb enough to believe him (because she loves him) then shes going to be miserably happy for the rest of her life.

Going out every now and then without each other is ok, but it looks like you have reason to feel the way you do. If i were you, i would do some investigating on my own. If he wont give you answers, then find them out for yourself. Being cheated on is one of the most horrible feelings in the world. Try and get details to where he is going for this party. Where hes staying at, who hes going to be with, whos all going to be there. See how much information hes willing to give out.

I think you know deep in your heart whats going on here, and your not going to get peace of mind until you know for sure. Do whatever it takes to get answers, because if you dont, you will always have doubts about your relationship!

Good Luck! Keep us posted!