When I started, DH assured me that my new diet was a fad and would never work.
Mind you, after I had shed my first 30 pounds, he was singing a different tune.
One day, after our daily bicycle rides when I once again kicked his fatter butt, he came to me and said, "fat flush me!"
The rest is history. We're both in P3/maintenance and between us, probably 130 pounds lighter - WOW, we've shed the equivalent of a small human adult!!)
My point is - ignore your DH. Lead by example, and get your support here!