Given that you met in a bar, he asked you out (not you and boyfriend) and said he'd pay I'd consider it a date. If a guy did those things and didn't consider it a date I'd be seriously annoyed. I definitely think hetero men and women can be friends but this isn't sounding like that type of situation.

You said he asked you a lot of questions, did you ask him about himself?

I agree that it may be a good time to talk to the bef about relationship.