You must love yourself FIRST if you want your body to do anything different or be anything different.
It is like this. If you don’t like someone, call them ugly, fat, disgusting, etc. And then ask them to do something for you. Do you think they will do it? Probably not.
Well if you call yourself and your body that, then ask it to lose weight, or be healthy, or heal, or whatever, you think it is likely to do that? Nope.
You must love yourself first. Then you are more likely to get what you are wanting from your body and yourself.