Aducart, get rid of all of your "fat" clothes. Go to a good discount outlet or consignment shop that sells quality clothes for, low carb beer, budgets. Allow your SO to get compliments on his fox of a fiancee and you will see a more supportive man. JMHO, you do not need his permission to dress better.

My husband is very supportive and is the family cook. He always takes my woe into consideration when he shops and cooks. My suggestion is to just keep on doin' what you're doin'. Your spouses will eventually support you.