Man, I agree with Backtothelab and JennyJenkins... obviously this guy means something to you so far.... You did just spend all that time writing about him, afterall. Why would you post about that if you didn't wonder what he's like really. Get to know the guy, but keep your distance... well... if you indeed want to keep your distance. It seems like he's a little odd, but maybe he's just playing with you and he knows that you're noticing him playing/singing to you. He might just be having fun and you're taking it too seriously... I don't really know, but try that perspective and see what happens.
he doesn't sing to me, except once when he went "want me to sing to you?" and then proceeded to sing without waiting for an answer yeah he is creepy, but it is kind of interesting i will admit
I'd be careful. If your getting a creepy feeling from him your guts trying to tell you something. People who don't respect other peoples space can be dangerous. They don't base their behavior on what's appropriate, they base it on what they can get away with.