Guys are guys, we're not overly concerned with being "friendly", especially with the opposite sex, not that we're just naturally antisocial (that's up for debate). I don't think he wants what you are calling a "friendship". He probably hasn't made a definite move on you because he is like you,...UNSURE, and doesn't want to do what he grew up learning not to do,...BE FORWARD (you know, gentleman kind of stuff).