I SIT BESIDE MY CRUSH AT SCHOOL AND I'M SHY! HELP!?

Trust me when I say this, no guy will think you are weird just for saying something to them. It's not that difficult to start a conversation. Sit down before he does, wait for him to sit down and say "hey his name, how's it going?" from there just make basic conversation like "wow it is really nice outside today" or "did you see the game last night"? and then just go from there.