IlikeSprite, have you ever been completely obsessed with a girl for TEN years? Such that you can't do anything because all you can do is think about her while lying around lovesick? Yup, that was me, starting fourth grade.
I'm 25, with a steady gf for 3 and a half years. I love my gf very much and it took her to get me over the girl I wanted for ten years...
My point is, love isn't what you think it is. It's impossible to gain perspective on it when you're looking at it from within. And that has very little to do with age - but rather, the experience of knowing not to trust these incredibly intense emotions and feelings after having them for the second or third time.
I'm not saying what you're feeling isn't love - but the people on this board tend toward American culture, where you throw around words like "love" and have ten sexual partners by the time you're 22 and be divorced twice by the time you're 33.
If thats you, where you would have a pretty liberal sense of the topic, I'd advise you not to pursue it. On the other hand, if you're like me, and the conviction you feel is that deep where you've never had it before, don't let age get in your way. Stay freinds with her and stay in contact till one of you have the facilitie to meet up. If you care about her that much, its not about the sex - in which case you don't have any urgency in meeting.
The reason I'd go against what most people here are saying which is categorically dismissing your feelings as horniness, is that I've been there before and in a more desparate way. The girl I liked never liked me back, but if she did, I would have given the world for her.
Disclaimer: In retrospect I'm glad she didn't, because I love my current gf very much, and I can pretty much guarantee I will never want to be with anyone else.