Why do boys seem to hate me?

As rude and callous as it sounds, if you are what society would define as abnormal or odd looking for any reason, this will also naturally serve as a reason for immature people to give you unpleasant attention. There's little you can do about this however, so I hope its not the case. The other answers citing boyish stupidity, immaturity and hormones as a reason are probably spot on either way, and sadly it doesnt stop yet a while.