Why does he get so TENSE and NERVOUS around me?

This boy and I have been playing games back and forth for a looonnnggg time now (a year!) I had a big crush on him, and he did also. But we have NEVER actually hooked up. I ignore him a lot and brush him off. He will be staring at me while walking by and I act like I don't see him. I laugh with his friend and act real cool with them. He's walked by me and he gets really tense and nervous and puts his hands in his pockets and rushes by me. Is this cause he LIKES me or HATES me and can't stand me? hmmmm..... please let me know!!