Well to be perfectly honest, he sounds kind of creepy to me. But I'm really not anyone to judge... my record is far from spotless, and I think someone might have just written it on blotter paper. In any case, in my experience, if he's straight and sorta creepy, he wants to explore your dark places. Men are easy. Go for it.
You could always wait until you get more proof, he will show more within time, and someday you will be sure about his intentions and what he thinks about you. It's true that we are all different and these days it's hard to discern a couple because I know, I see, and I'm also one of those whom happen to have a guy as best friend and get along very well and you might think that we are together if you see us out :S (okay we are not kissing or anything xD but still..) it's just that we are comfortable with each other.
He could like you, but he could also be comfortable around you. You could always ask him and make a joke about it (to not sound stupid), or you could wait until the truth reveals itself and gather the required courage that is needed to speak to him