N.M.
Oh goodness... I have been there. One thing I can tell you is that you need to tell him the truth. Not that he can't satisfy you, but that you are not satisfied with yourself. Nothing kills a women's Romance than not feeling sexy.
I was like that with my hubby too. I was not looking the way I thought I should look. And it didn't matter how many times my husband told me I was beautiful... I didn't FEEL beautiful. I told my hubby how I was feeling and he worked with me to get over the image issues. You NEED to tell him how your feeling or he's going to continue feeling rejected. Maybe he can help you.
When I talked about how I didn't feel sexy anymore he told me he was feeling the same way about himself. We started to change our diet and exercise more together. We are now well on our way to a healthier us and very happy with our bodies. Sure I'm not the figure I used to be, but I do feel sexy in my own skin again...