If he has a girlfriend it's best to just leave it alone. No one wants to left for someone else.
For the past couple of weeks this really cute white guy keeps looking at me. He talks, (or will talk) to everyone except me. I think he's purposely ignoring/avoiding me. He never smiles; he just stares. The thing is he has a girlfriend. Any advice?
I'm not sure what the problem is .. So what if he stares .. He HAS A GIRLFRIEND.,, end of story.
If he is trying to entice your attentions then he is a person with a warped sense of what It means to be in a relationship.
.. and then again, like you said .. he never even talks to you , so maybe what ever it is you "think" he's thinking about you is all in your imagination.