How can I tell if he likes me?

I've known this guy since last July and we're friends with mainly the same people. At first when he got here, my bestie told me that he had told his roommate (coincidentally her boyfriend at the time) that he thought I was cute. I didn't pay much attention cause I was crushing on someone different. Then about a month ago me and him ended up spending the day together and talking and stuff. A couple nights later we went to the movies and i ended up sleeping over in his room. Then he had a birthday get together and all of our friend were there and we ended up bickering and brought up some stuff about what we had done (slept together) with each other. He didn't deny anything and I'm not sure if thats a good sign or just normal. Then he went home on vacation for two weeks to visit his mom and family. Then yesterday, i was at work and he was kinda my taxi for the day. Normally we only have to fifteen minute runs but yesterday we had three or four. While we were driving around he was telling me a story about something he did at home (he's always telling me stories) and then we were trying to see what someone looked like and I was saying they were ugly and he was like, "how would you know, you dont have gles on." I started to think about it and he's never seen me with my gles on and i'd mentioned it in casual conversation when we were at the movies. We always have these little spats about nothing and he's constantly making fun of me. Like, he was making fun of my ringback tone when he called. I'm not sure how to take any of this and it's really hard to have a serious conversation cause he doesn't ever seem to realize i want to, but I haven't told him either... please help me....