How do I know if a guy likes me?

Well this guy I like is really funny and cute. I wanna know if he likes me. Though, for us we don't really like respect eachother cuase we're more like joking around. And we're always dissing each other and it's fun. And in cl, I always catch him looking at me, then we just make like funny faces at eachother. Like during a math test, we both couldn't solve one problem, and we were just looking round the room to see who was done, or if they were stuck too, and we just looked at eachother and he started making faces. He's not really like someone who respects you, and i like him like that. He's more of a funny person, and he never gets mad at me.