Does he like me back...?

Ok so I have known this guy since kindergarten, and I have had a crush on him since 4th grade. He does crazy things and then looks at me to see if I thought it was impressive or not. His sister is my best friend (she is in our class too) so I see him a lot. Me and him are in LOVE with baseball and our favorite team is the Arizona Diamondbacks. We were watching a game one time and they were playing a team we hate so he was at the t.v. and like slapped it when someone bad came up. He smiled at me after that, but he is shy so that kind of surprised me. He also calls me stupid and other things, but guys usually tease girls, right?