My situation wasn't exactly the same as this (my g/f was out of highschool but not going to a post secondary) and i can say that we made it through the first year just fine. However i will never forgive myself for the time i lost talking to her on the phone, time i could have used to be socialzing. Now that we've broken up i realize how much time i wasted on her. So i guess my advice is that you should be very sure about what you want, and also to realize that time spent in a relationship is not always time spent strenghining a realtionship. Oh and one last thing, my two motto's
1) you want it? you got it.
2) Shit happens.
remember those and there's not much in love or life you can't handle