My boyfriend movied to another state openly, how do I carry on this relaionship?

Well, this weekend my b/f went out for his birthday with his friends since he's going to be back here with me in IN. I haven't heard from him at all. He said he was going to go to a couple parties and to a couple of clubs. He does drink and he does smoke pot. I've thought bad thoughts all weekend about him and other girls. Should I forget those thoughts or shuld I act on them? When I saw a club scene in a show over the weekend I couldn't help but think of him and other girls dancing and having a good time. What should I do? I need someone to talk to me.