@Gotteem,
This is simple advice: don't date where you work. Clearly he will blab anything and everything. When it goes badly, and it will eventually, this will become public gossip. also, based on his comment where he asked you why you were working there, he's harassing you (in more than one way). He's making an uncomfortable work environment. I'd warn him about that. If he doesn't stop that behavior, it should be reported to your supervisor.
Find someone else to date that isn't a jerk as this one is. He doesn't sound too mature and based on what you have written, you two don't seem like a good match.
Instead of wondering whether he is trying to ask you out, you should be asking him when will he stop harassing you.