he has always had a crush on you, he only bullies you to get your attention 

every time you talk to him he gets nervous, but he knows how to make that feeling go away

When you don't pay attention to him, he looks at you as if you were a work of art. 

If you ever get to be friends with him, he'll be a completely different person, it would be clingy, caring and everything related to the word "cuddly"

He seems calm, but when he sees someone approaching you, he becomes very jealous.