He's a stalker, get a taser and taser him a couple times... he should stop then ahahah

No, seriously get a restraining order and if he shows up near you call the cops. You could also charge him for stalking, the police will pull his and your phone records and see if he called you from a cell registered in his name.

PS. remember that a restraining order is just a piece of paper, it won't really stop him from coming near you, so beware that he could become even worse after you slap him with a restraining order.