Ask questions, meet dancers, and be part of the conversation.
I get creped out
Mmm, crepes.
Sorry, nothing constructive say. Good luck.
In immediate reaction to something he does: "It makes me a little uncomfortable when you kiss me like that/say things like that. You know I just think of you as a dance partner, not a romantic partner, right?" Hopefully then he'll try to save face by saying, "yeah, yeah, of course, I didn't mean anything by it" and switching to more business-like partnership behavior. (Maybe he's just joking in the first place, and he just needs to know you don't like it. But even if he is sending out feelers, this gives him a chance to pretend he's not and just change his behavior.)
The only good reason to do it the way you describe is if you think the only way to keep the dance partnership is to keep him hoping there will be something more in the future, without actually giving the something more to him now.