Not that there's anything wrong with this, but I think there's ways for you to feel better.

If you dressed, not in tight, revealing clothes, but just in clothes that fit well and look good on you, it would probably help your self esteem and make you feel good about yourself. (this is something I know from my own experience and my bff who recently started doing the same thing)

The part about the sex...more difficult but I think possible...it will take longer...right now it's almost like you're letting him use you as a tool...which is not what a husband and wife relationship is supposed to be about...if you are feeling better about yourself...you might be able to see that you deserve to be loved, and allow yourself to enjoy being with him.

These are definitely not easy things to do...and not going to happen overnight, but having a willingness to try....is a step in the right direction.