This is difficult really as i don't intend to advocate poor health but i also believe that people are entitled to live their lives as they see fit.

I guess this depends on what you want really. No one should feel pressured into something they don't really want or can't better achieve without love and support. In all honesty, I can't imagine this situation dying down any time soon. I could of course be wrong but if you're intent on saving your marriage and also want to lose weight for yourself, I feel there is action you can take. It may be worth discussing with him that in order for you to be successful in achieving a healthier lifestyle, he needs to work with you and not against you. If he continues to be thoughtless - almost to the point of cruelty - only you can assess what options are left to you.

Speaking as someone who's been both anorexic and obese throughout their lifetime I may not be best qualified to give advice but here's hoping that through my own experiences I've managed at least to be vaguely helpful.

I truly hope your situation resolves for the best.