OK so this guy is always sitting with picks on me and treats me like I'm one of the boys but he only really does it to me. This is a different kid from before... he always laughs at me like a having fun laugh. He always tries to make me laugh. And most of the time he smiles at me. What does this mean.

Maybe he likes you. Ask him.

Assuming you are 10 or so, it means he likes you.