Boyfriend, Moving away? Help?

My boyfriend just left today at 7pm and I didn't get to tell him everything I wanted. His friends were crowded around him so I didn't wanna annoy him really and be like "aww im going to miss you" and get all embarring, though now i kinda regret not doing it. I was talking to his friend who is my friend also, and he said that he just doesn't want to say goodbye because he is scared hes going to get over emotional ... He says he is going to visit and he doesn't know if hes stay up there the whole summer but he will be visiting for sure. He doesn't know if he will be back for the school year yet or anything either. I'm scared that he is going to meet a new girl upstate,and fall for her. I talked to him about it but he said he wouldn't, then changed the topic. I just can't bring myself not to worry about him. I don't know what to do, say, or even how i should feel about the matter. Help me please??!