Sorry, he's treating you so rotten. As far, as I can find, Schizoid Personality Disorder, is the one that has criteria for "has little, if any, interest in having sexual experiences with another person."
Have you, been able to sit, with his doctors, to explain, to you, what his illness entails? And, has your husband, ever brought you with him, to describe, what life is like, within the home? Couples counseling, could help, as this is a recent diagnosis(?).