He's stalking you. Call the police. Give the man's description and exactly what he's doing.

Agreed, nasty stalker. see if the cops will help you get his name/address and other info needed to get a restraining order. Then GET a restraining order. watch for him and then have him arrested when he inevitably comes back around. Also, self defense training. Don't become a victim.

So instead of calling the police and reporting him, you post about it on FML. Sorry, but to me, it seems you like the attention. I would have had the police involved after he followed me to the store.

Call the police NOW. If he knows what floor you're on, he probably waited outside after you went in to see which lights come on when you go upstairs. He probably knows what apartment you're in. This is a dangerous person.

Challenge him to a game of one-on-one basketball. If you win, he leaves forever. If he wins, he becomes your roommate. That was easy.

…. Report him… wtf? Call the cops… anything rational…

get off FML and call the police

So many options, though anything smaller than a .380 probably aren't good ones. 9mm is pretty popular, and is a great way of keeping yourself safe.

get off fml and call the police