I can do all things through Christ who gives me strength!
My XH has childhood trauma issues that messed him up. Your husband is a sex addict. That, or whatever caused that, is why this is happening, not because you have a normal figure or a few stretch marks.
This is about his weaknesses, not yours. Hard to wrap your head around, but sometimes recognizing the extent of how messed up the other person is helps.
I told my husband this time after time. Why did he have to go after 20 yo. I'ts not healthy but I now undress in the dark quickly and very self conscious in bed.
It is a thing I have to work on myself and it is hard.
We are beautiful no matter what and for me I need to validate myself in other ways beyond the physical. Other people like me for who I am. I try to have the attitude that I don't care what he thinks. I am me.
Of course this is hard. I will tell you that my 21 year old son posts pictures of size 14 women on his tumblr account that highlight how beautiful they are. He is a very handsome young man and is living with an average sized girl (ie not super thin). You may want to check some of these images out online. Both of our children rebel against societies messages on female "beauty".
I would also recommend that you work on feeling good about yourself unrelated to your WH. Feeling good about your whole self, inside and out. Use your body in ways that make you feel strong and powerful (ie yoga, working in the garden, walking, etc), remembering that your body grew and nurtured four human beings, spending time with people who value you. Also, perhaps get yourself some nice lingerie or clothes, just for you, that make you feel good about yourself. You are beautiful and you just need to do things that remind you of that.
Your WH's issues have nothing to do with you. Halle Berry got cheated on, for goodness sake.
Hugs to you.