For this kind of situation, generating feelings is inevitable, but as long as people are together, more or less they will generate feelings. But you don't have to worry too much, teacher. There are many kinds of feelings, for your case, maybe your spouse likes to go square dancing, maybe he is not as good to you as before, but understanding is definitely the best way.
You don't have to ask too many questions about this situation. Too much suspicion will only alienate your relationship, and if he inwardly compares you with his dance partner, it will be easy to develop bad feelings. So you can try to tolerate him, care for him, eliminate his worries, let him feel no pressure at home, I believe so, so things will dissipate.