Being Stalked

There is this guy in my library, And he's making me very uneasy I sat next to him one time, But the choice wasn't mine It was the only computer open, And no words were ever spoken I think he likes me, but I don't see why, I never once gave him any reply Monday, he came up from behind and said to me, I've been reading and copying your poetry I asked, where did you get it from? He said nothing, but instead just acted dumb He said he knows all of my poetry sites, But he never asked if it was all right He must have been watching my screen, And mentally noting what he'd seen Tuesday, he chased me after I went outside, And asked me if I wanted a ride I told him no, I'm waiting for the bus, And he put up a really big fuss I'm starting to get really afraid, And am feeling like an animal's prey How do I get him to leave me be, Should I inform mall security?