IM GET STALKED HELP WHAT SHOULD I DO>>?

okay so there's someone in my school who made up a fake and Its Luke Felton and he adds like the whole school on facebook no one knows who he is and he knows some of my friends schedules and now he has my schedule and has my number and he's BLOWIING UP MY PHONE AND WHAT SHOULD I DO! and he knows my whole name HELP HELP