Agreed. Coming out to a crush has never helped me personally as it was pretty evident they weren't showing as much interest in me as I had in them. For me, crushes have always happened when my exposure to the person was one-sided/parasocial (as seems to have been the case in your lesson). I have found that the most effective way to prevent this is to get to know people that excite you on a personal level before a crush can develop. This usually means enthusiastically trying to interact with them moment I notice them and abandoning them if it does not work out — instead of watching them for a while and then deciding whether to approach.

Maybe you could get a new instructor, but tell the current one why, and say you just feel it's right to move on.

Then, if there's any reciprocating feelings you might find out. And if not, at least you're already moving on.