How do you get a perv to leave you ALONE?!?

No karkie not all guys are jerks. But your best bet is to make school staff aware that this guy is haring you, there are laws about that sort of thing and school officials are sensitive to being caught not doing their job. Tell your parents and ask your mom or dad to call his folks; I have a 13-yr old daughter and when I called the guys dad he stopped messing with her right then. Don't play 1-on-1 with him, you can't win an argument with an azzzhole. Good luck!