I know what you're going through- entirely unexpectedly, I met the most amazing girl about a month and a half ago. We're now going out. Both of us will be at different unis, and all the advice I've heard is "Break up before uni, because its just too hard- it'll break it up for you, and that's not a good way to leave a relationship". But I do know of couples successful at surviving through uni, even when one of them isn't there, and their advice has been solely about trust. Do you trust them enough? I trust my girlfriend, and she trusts me, so we're going to try and make this thing work.
You're in a slightly different situation, but I really think you should give it a shot if you like him that much.