Okay so this sounds pretty cute so Imma try and help but if you're to scared to talk to him try leaving a letter in his locker and just say "Look I'd like to get to know you can be friends!"
(Yes I know friends probably isn't what you want but! you guys may not get along and you can get VERY hurt and I'm worried the same thing happened to me and it wasn't pretty)
and put whatever forum of contact you'd like~ if he says he'd like to be friends after awhile try talking to him but if you can't then try being in a group of some of you closest friends (Tell them what's up) and then when you comfortable tell him in you own words just pretty much say that you've liked him for awhile and would love for a chance to date him <3
I hope this helps!! best of luck~
P.S. PLLEEEAAASSSEEE
PM me to tell me how it goes this is very cute! I just can't handle it~