Bernice:
You should never tolerate harassment or other users making you feel uncomfortable.
Verbal Abusers & Stalkers get a major thrill from making you angry. It is a cycle that repeats over and over again.
Abusing or Stalking is a matter of one person trying to control another. Controlling you brings them pleasure. If they can force you to react this gives them even greater pleasure. If you scream, rant and rave they win. If you panic. They win. If you make empty threats to them, they win. If you argue with a stalker, they win. If you run around telling all your friends and the stalker hears about it, the stalker wins.
So the simplest way to stop a stalker (in the early stages) is DON'T REACT. Make them get bored and move on.
I know it's frustrating, but alanback is right. Try to ignore him & he'll go away. Good luck