Sometimes, my patience doesn't exist

There's this one patron who annoys me. My boss teases me and says, "Oh, is that another member of the Nexgrl Fan Club?"
He will stand in line and wait until I'm available. The other thing he does, is stand near the pillar by the reference desk and stare at me. He tries to use one of internet computers that face the reference desk, so that he can stare at me. How do I know these things? Everytime I look up, he is staring at me. He will ask me the same questions over and over again.
My breaking point came about 3 weeks ago. He waited to ask me to help him with a computer that was on the opposite side of the room. It was the side that my co-worker was covering. I spoke to the guy sharply and said, "OH, YOU COULD'T JUST ASK MY CO-WORKER TO DO IT?". To my surprise, that was all it took. I didn't see him for about 1 1/2 wks. Last week, I saw him talking to one of the librarians on the internation side of the floor. The day after that, I saw him using a computer near the reference desk, but he left without bothering me. I am hoping that this lasts forever!