Can someone please tell me how to get rid of a guy that won't leave me alone?
Depends how seriouse it is. Of he just likes you then tell him straight up. If that doesnt worl get some other guy to tell him for you and maybe he will take a hint
Be stern, don't be afraid to be aggressive. If it doesn't stop inform an adult or authoritative leader.
Tell your Dad or older brother
First tell him to stop, but if that doesn't work then tell your father or older brother. If that doesn't work, get a lawyer or the police involved.