He is very insecure and he is so scare to lose u that he things that once u lose the weight u r going to leave him. They don't realize that there are men that likes big women. I know this because my husband act the same way but like everyone else i don't think u should leave him. Go to therapy together. Remember that this is a huge change for everyone not just for u. I don't believe in divorce and i will fight for my marriage because that is how the contract works. Lol. Try to understand him. He is scare of losing u thats all, it is up to u to show him that his action will lose u more than how much u weight.