There is no other sane option. Sometimes he says he wants to try, but he doesn't do anything. It doesn't matter. What matters is how he is behaving towards you. He can sincerely want to lose 10 pounds, but unless I put the effort in to diet and exercise, he won't.
Actions speak louder than words.
But your body already knows that - and is trying to tell you. Unfortunately, your head is rationalizing and getting in your way. He loses his mind when he's angry, and lately I have trouble controlling myself. You can only take so much. I couldn't even control it.