I think some of us are being needlessly cruel in this thread. And we have been reading a lot into the OP’s few posts, although what one person reads into them may differ radically from what another reads into them.
Anyway, it seems pretty clear at this point that the OP can’t do much if anything to change where his girlfriend goes to college, short of being so nasty to her that she would rather do anything than go to Alabama at the same time he does. And that doesn’t seem like a good course of action, or something the OP could even pull off. However, it’s about equally clear that it’s not the OP’s fault that his girlfriend wants to go to Alabama with him. He hasn’t asked her or encouraged her to do that.
So it’s mean of us to harp on the disadvantages for either of them in attending the same college. I think the OP is aware of them, but he can’t do anything about them at the moment. The girlfriend seems very immature, and so does the OP to some extent. Luckily for everyone, immaturity is something that time tends to cure. I believe that every day in Tuscaloosa there are kids who are growing into adulthood successfully.
As @MotherOfDragons suggests, the world’s not going to come to an end any way this goes. Maybe everyone will get lucky, the girlfriend will get accepted at UVa, her parents will pressure her to go there, and problem solved. Maybe the OP will get a better offer someplace else that he would rather attend than Alabama, and he’ll go there without her (but it sounds like he will have to withstand a storm of tears to take that course, if it’s even a possibility). Maybe they’ll both go to Alabama, and some hunky frat boy from Mobile will sweep the girlfriend off her feet during orientation. Maybe they’ll limp along as a couple for a while, then break up. Maybe they’ll do that and get back together again later, sadder but wiser. Maybe they’ll actually grow and mature together, and want nothing more than for their children to join the Crimson Tide.
As long as the OP can look at himself in the mirror and know that he’s treated his friend with respect, that he hasn’t played her, he will be alright, and probably so will she, no matter what happens.