Depressed Muslim I have to vent

I don't know what to do anymore I try to make my fiancée happy today he said I was overweight and it broke my heart I've lost 25 lbs so far and it's hard having thyroid cancer to lose weight I'm suppose to have surgery in two weeks but it seems that he is never happy I try to cook meals from his country , I try to go above and beyond to make him happy and it seems my trying to make him happy is affecting my happiness .... I need advice