I need advice 🥺

Okay, so I'm really insecure about my body, I hate everything about it and I struggle with letting my boyfriend see it when we have sex with the lights on.

The thing is that today we were cuddling after sex and talking and he said that I should work out my back and that it would look prettier if I did. I already knew that he liked toned backs, and I thought that mine was okay because mine is a little bit toned but he said that and I was a little disappointed. I feel stupid now writting about it but it's how I felt.

He tried to make me forget about it when he noticed that I didn't took it well, and I know that he didn't want to hurt me. I just wanted to talk to someone about it, because now I feel like I should work out because of what he said.

PS: sorry for any mistakes, English is not my first language.