Dear Alex,
This is definitely emotional abuse, and doesn’t come from a loving place in any way. he will likely use emotional abuse and manipulation when/if you try to break up with him (and tell you things like nobody else will want you; you’re lucky that he put up with you, or make up other hurtful untrue things about you). Regardless, better, sooner-than-later, to get away from him and rebuild your self-worth. You deserve way more, skinny butt or not… 🙂 Good luck to you.