Welcome to America...land of the repressed...where someone is ALWAYS offended by something everywhere you go. It certainly sounds like this guy is interested in you. Picking up chicks in the workplace is risky because people are so litigious here, and yes it can make things uncomfortable if you get involved with him and things go bad. Have you flirted back at him at all?
I kiss pretty much wherever the urge strikes me, but sometimes my guy friends complain when I plant one on them. lol
Pain is what the world does to you, suffering is what you do to yourself. Pain is inevitable, suffering is optional.