What is my coworker trying to say?

[TechGromit]

Reminds me of the song Bonnie Raitt, "Something To Talk About". Since he so comfortable with you, he's beginning to think you two are more compatible than his (and your) significant other.

[Reenale]

That was his way of feeling you out before he moved in for the kill. He was baiting you into telling him that you must have him.

[trueblue01]

I don't have the exact same situation, but I have a co worker that keeps trying to make those "subtle hints". If they are in a relationship, then you have to remember "Once a cheater, always a cheater". It's extremely hard to change those ways, if possible for some. But it sounds like a loaded mixed signal...