Need Advice!

So I'm a sophomore, my bf is a senior and we (obviously) really like each other. we've talked about our futures and everything and I really thought he was the one. he talked about moving closer to me for college a while back and I asked him about it today since he is applying for colleges, but he started being difficult. I asked him if he just planned on breaking up with me when he went to college and he said he didn't know. he also told me I was being irrational when I told him that there's no point in dating if we're going to break up anyway. I really like him though and see potential in him. What should I do?