So - so far your husband identifies as mono. You won't have sex with him because you don't like the sort of sex that he likes. For the moment, he's celibate by choice?
Is sex just not important to him? Or are you and he waiting until your kids are older before he finds a mono girlfriend of his own and you and he shift your relationship to one of friendship? Or are things just not clear yet?
Wishing you all luck.