I think he sounds totally interested in you! And that he's using work as an excuse so he can see you soon. He probably keeps bringing up work so that he'll have something to talk to you about on the phone. That's something I would totally do if I were talking on the phone with some guy I had a crush on. I say go out with him and flirt and have fun and see where it leads. Sounds like it would be fun to go out with him.
How To Prevent Flu
How To Prevent Flu