I think my friend here needs some advice aimed more at his age group.
I've been there man. I've had to deal with the girl I loved for many many years being around me just about never. I can honestly say that it didn't really work out that way. Long distance is difficult, but love can surpass everything. If you two are dedicated to each other, and you do get to see each other at school, you'll get through it. Don't give up on her just because of the distance. A better reason to date around would be the fact that you are so young. But alas, I was in love at your age too, and I believe that true love can be found at the age of 13. I won't question the legitimacy of your feelings.
I don't think you are worried about flying to visit her and all that stuff, because it appears she's closer to you than that. In fact, if she's local, you probably don't have to worry about phone bills either. This being said, your feelings are coming from wanting to spend quality time with her in a more private situation than school has to offer. My suggestion is to plan maybe one day a month when you guys can get together like that. It's possible to get through this without losing the relationship. Just be creative about it, and control your emotions, instead of letting your emotions control you.