My advice would be to meet with an attorney. It's high time you came up with some sort of legal arrangement about your finances, and your marriage, in order to protect yourself. Do NOT transfer the car into your husband's name, or do anything else, until you've sought the advice of a good family law attorney.
I would wait a day or two, and then text back to your husband "We will be back in touch regarding this matter." -- nothing else. Let him wonder about the "we."
