No where in the vows do I remember if one gains weight it's a deal breaker. I believe it's in sickness and health. The changes you're making is start remember to add water watch coming off meds without a dr order. Always lose weight and improve yourself because it's what you want to feel better or look better or be healthy. My question is does your husband look like a movie star. Is he the same size when you married. Never let someone tell you you're not good enough for them. Sounds like he's insecure and thinks you could look elsewhere so it's a bullying tactic. Best of luck to you