Don't worry, you aren't doomed to live a life of solitude just yet. You're young, and trust me, once you get to college, there are going to be so many chicks that make you forget about whatshername, it will make your head spin.
My advice to you: you've already done too much. Lay low now, don't sweat her anymore. She knows how you feel, the seed has been planted, now the ball is in her court. But most important: don't get intimidated and start acting twitchy. Girls hate that. Treat her exactly the same as normal now, show her it doesn't have to be weird between you just because you professed your love for her (and basically hung your nuts out there).
Good Luck, and bang at least ONE girl in college just for the GQ, dedicate her to me and remember I was right!