My boyfriend has a fat and he asked me gain weight. What to do?

Hey hun, dont gain weight just to please him. Being very overweight is not a good thing and it leads to health problems as well as lack of confidence. Do not change your body for somebody else, only do it for yourself. If you were underweight and he wanted you to gain weight that would be understandable, but not when you need to gain. If any guy asked me to gain or lose weight they would get the boot. Dont gain weight to please him. Good luck x