How do I stop a crush from developing further?

I think I got a crush on my dance instructor. Which fucking sucks for all the obvious reasons. Normally I wouldn't be so worried. BUT I JUST HAD A GODDAMN ROMANTIC DREAM ABOUT HER. Seriously I just woke up from a dream about her confessing her love to me and me eagerly doing the same about her.

So how do you stop a crush from developing further? Because this is a well from which only disappointment may be drawn.

Edit: I am single btw.