>>6 I disagree. Known for four years means since OP was 15, which is a little girl in adult terms.

OP, you'd have more of a chance if you were in college. You're straight out of high school, and if he's known you as a student for those four years, then you're still a student to him. I mean, you can go for it, but be prepared for "that's really sweet but..." type rejection.

>>7 probably has the best method.