Don't sweat it. Chances are, you won't be offered the job, and even if you are, you'll only be there for a year or two before moving on to something better. So go in, be relaxed, be honest, but don't give the guy any reason to reject you.
edit: oh yeah, about the girl, you're a college grad now. You got things to do! If she wants you closer to her, let her go out and find some openings for you (job openings that is). Otherwise, let her come to you when SHE's done!
