hi dior
sorry to hear what you're dealing with.
i wish i could send a bucket load of strength over to you.
i'm really not in any position to comment (given that I am still letting H mess me about) but he is controlling you and he's doing it deliberately out of his own fear of being alone, not living with ds and possibly losing what probably appears like a successful family life.
IMHO, you're in a no-win situation. he won't give you the healthy positive love and support that you need in order to regain your happiness (and possibly your size 10) but he will keep denegrating you whilst you are unhappy and (so-called) over-weight.
in a perfect world we none of us should be reliant on someone elses approval or affirmation for our self-confidence. but in reality we do react to the perceptions of ourselves from those around us.
i cannot truly believe what he said about someone else finding you attractive would have something wrong with them - what a truly effing nasty and negative thing to say.
OSJ's right, sometimes there's strength but mostly there's just the end of the road and you will know when you've reached it.
i really think counselling will help you, not sure about your H tho. i think he's gonna hear a whole heap of stuff he won't like. i'd urge you to keep going even if he backs out tho.
you have all the strength and beauty and confidence that you need to make yourself and ds happy - you've just lost sight of it right now.
you'll find it again tho, i promise you that.