I need a guy's opinion?

Okay so I recently met this guy. We aren't "talking" or anything. He always compliments me on my style, and he has also mentioned the fact that I'm skinny. He always starts the conversation with me (I can actually only think of one time where I actually started it). During class, he has been asked frequently if he is taking this other girl to formal, and he will just look down and says, "I don't know." He has also complimented my handwriting, which seems a little bit irrelevant, but I thought I would include it. When he talks to me, he always faces his body towards me (or as far as he can turn if he is sitting). He also thinks I'm smart.

He also does his share of teasing. He always says things like, "Fight me," with a big grin on his face. He will push things on my desk toward me and just look me in the eyes and say, "Let it happen," and will continue pushing it towards me if I try to move it back.

He is definitely not a shy person, and I am.

My question: is he interested, or is he just friendly?