I usually don’t answer advice anymore, Not because I don’t like it, I do, but because I just start thinking about ‘how can i give advice, when i can’t even listen to mine,’ It just doesn’t make very much sense. But, i don’t know, something about your question just seems familiar. I don’t know if i know you or not but if i do, i just want to let you know that im here for you anytime and if just a stranger, well i’ll always have an open ear to listen. 
Anyways, lets get back to the question. (sorry about the mini-rant) 
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Hmm, well I see how it could be a problem that he’s going away to college. He will be busy, its going to seem that school is hogging up all his time, you are both going to miss each other a lot. But all of those things are still workable. I’m going to guess that he is going to school for business, since that is probably one of the most competitive programs in the U.S. Its also the most common. If he enters the program, i am sure he is not going to have a lot of time for you. But you two could skype each other or use Google+ hangouts to talk and see each other. It will help a lot. If one of you has a car, you could make a date every week or whenever you can and meet up. On those days, it will be just you two. No family, no friends, just you, both, together. Maybe do couple activities on these days or say watch a movie, stay in at home together; so many things you can do. If you two are determined to make it work, im sure you two can make it work.
About your feeling that he might not want to make it work, well that’s a different issue. That has to deal with trust. Ask yourselves a couple questions and maybe later with him. Where do you see your relationship in a year, the year after that? Do you love him? Does he love you? Can you see spending your whole life with him. Now these might seem like simple questions but so many couples can’t answer all of them. If you can answer them, trust that your relationship is strong enough to handle this little obstacle. If you can’t, it’s not necessarily a bad thing, it just might be time to have a talk about the relationship and where it is going.
I wish you the best of luck and i hope it all works for the best. And remember, im always here to listen.
