He sends so many mixed signals! Does he like me?

The good:
•Looks at me. A lot. Used to have eye contact for 5+ seconds, but he looks away quickly now
•Turns entire torso to look at me quite a few times while with friends
•Leans towards me and faces me most of the time, even when talking to friends
•Pupils seem to dilate when I'm around, but that could be my imagination
•Supposedly checks me out when I'm not looking
•His best friend knew my full name even though I've never talked to him. Maybe I've been talked about?
•Starts 50% of our conversations, no matter how random
•(joking about an ugly prize after the blood drive) "But it'd look great in your bedroom... erm... home?" (Blushes and looks away, though 'bedroom' didn't sound suggestive until he made it awkward)
•We don't talk much. Just in class, and even then, hardly. But it does seem to be increasing slowly.

The bad:
•Looks down when we talk, not at me. Maybe even avoids eye contact
•Might be going to Prom with a friend. She has graduated boyfriend, but still. He has talked about her to his Marafiki while I was around and may like her
•Recently seems to be avoiding me in the halls, but that could be my imagination
•Hasn't asked me out yet even though it has to be obvious I like him