how to tell this boy I don't like him?

[Hilary]

For a while I've known that he likes me. His friends tell me and now he wrote me a note. Apparently there was one he put in my locker before but I didn't see it. I DONT like him. I have never had a boyfriend and don't want one (well at least i don't want him as by boyfriend) I don't know how to tell him no.
I don't like talking to people to their faces most the time. Should I write a note?
He also said he's enjoyed our Facebook convosations (I have only talked to his friend but later unfriended the kid because he annoyed the crap out of me) and told me he likes my profile picture , flattering for most but it makes me feel like I'm being watched, stalked almost.

Please help


PS he wants a reply by Monday