Does he want to date me or what?

I think he's making a bad joke.

I also think he's being awfully cryptic. Personally, I would find that annoying as all get out.

How about asking him - what's going on - do you want something to happen between us?

The worst (maybe) that happens is that he backs off and says no. And, frankly, as a guy with a girlfriend, he should do this, yes?

This is why i'm asking, because he was so cryptic with me. And now im curious about it.
Maybe he just thinks that im angry... lol.... idk...

Yanno, the longer you pick apart every little thing this guy says, without taking action, the more crazy-making this is going to be.

I suspect the guy is just being friendly and doesn't even realize he's being flirty, or he is doing it as a part of his work. A lot of sales/personal training type of work behavior is very, very close to flirting. And it is meant to be. It's how they get people to come back and it is how they get people to buy more goods and services. If he can sell you whatever products they sell at the gym (yoga mats, whatever) or get you to renew, he gets a commission.

The guy has a girlfriend. The more I think about this, the more I suspect this is a sales gimmick. Then you'll really freak him out if you come out and ask him what is going on.