Let me be very clear about this if you want to keep dancing with your instructor "DO NOT" repeat "DO NOT" get involved with him. I made the mistake of having a brief affair with my instructor and we both professed our love for each other and it still ended sadly. Now I have lost the most important thing to me, my dance instructor. Be smart and do not say anything to him, he may flirt thats part of his job to keep you coming back. Do not read anything into it.
Good Luck.