Well, I can't really provide concrete advice for you my friend, because I have been in a similar position. There was one girl I really liked in my class, and it seemed she was dropping hints that she liked me, so I gave her chocolate near Easter, but then she avoided me for weeks. I won't bother with the whole story, I did that in another thread, anyway...

All I can say is that if it doesn't work, you will get over it. I did.