Please tell your husband that his religion tells him not to force people to become a muslim against their will. You have to make that decision yourself. He previously agreed for you to follow your religion so therefore he cannot change his mind to suit himself, if he wanted a muslim wife he should have married a muslim.

The title of the subject is in the Quran so he should know this as islamic law. Do not let him make you do otherwise. Dont mix up between religion and culture (if you are both from different ethnic backgrounds)However the decision of divorce is not easy and you should think of the children before you think of each other.

I hope this information is of help to you.