The cranky old lady part of me is screaming at you to 1) get off my lawn and 2) stop worrying about any sort of relationship where there isn't some sort of contract involved, then is calling you a darned kid and chasing you with my walking stick. The former young college girl in me who dated my husband while I was in nursing school is patting that cranky old lady side and reminding her that she was young once too and telling her to chill out and settle down.
So....given that, I will tell you that you won't have a lot of time, period. HOWEVER, you have the luxury of living in the age where technology is king, and things like long distance fees and having to use a special code to call long distance from your dorm room phone are things of the past. While you might not get a lot of in person time with your significant other, you still can do things like email, IM, text, and of course face time. My husband went to college in another state, 6 hours and 2 states away from me. We managed through phone calls and the very primitive version of email back then (this was over 20 years ago, so picture dinosaurs and sending smoke signals...), and about once every 2 months one of us would make the trip to visit in person for a weekend. It was hard, and I missed him like crazy, but we both had our heads on straight and knew what we wanted (each other) and therefore could focus on our studies just fine. When we did finally get married, it was weird to have him there all the time after being separate for so long.
I do strongly agree with one poster who said that do not, under ANY circumstances, give up your education or any sort of job opportunity in the name of a romantic pursuit. I can personally attest to having made that grave error with the gentleman I dated before my husband, and I definitely regret that choice. However, every mistake teaches us a valuable life lesson, blah blah blah, I'm the person I am today because of my journey, etc. etc.. At any rate, don't do that. Best of luck to you. You'll be fine.