Young love? Advice pleaseeee!?

Okay so im not sure I did the right thing.. Me and this boy have been on and off since august and we've been through sooooo much. Overall he's a really good guy. He tells me how much he loves me everyday and how hes gonna marry me someday. None of this would be a problem if I wasn't moving out of state in a month. Because of this, I've been holding my feelings for him back, and pushing him away. I even went so far as to kissing another guy, but he still stayed with me, so obviously his love is deep. But I guess I'm just not feeling the same because all I can think about is the move., I just dont want my feelings to get any deeper for him when I know I will most likely never see him again after next month. So I broke up with him. He was really hurt :( but I didnt know what else to do. He keeps saying that we should just cherish what we have before I leave but I just feel differently... But I dont know, do you think I made the right choice breaking up with him?