Crucial Skills®

I have been with my husband for twenty-five years and I am fed up with his gaslighting! I don’t think he knows he does it, but when I try to talk about it, he gets defensive. Whenever we disagree about something, he walks off muttering to himself. When I ask, “What did you say?” he says, “Oh, nothing.” Or he makes something up. I feel he thinks I’m stupid. How can I address this?