I feel really sad for you,
in the 24 years I have been with my husband, I have been size 8 to a size 22, and back again a few times,
due to difficult pregnancies, illness, medication, cancer,
I am extremely fit, at points such as after a year in bed, it took a while to get that back,
but my amazing adoring husband has always made sure I know how much he loves me and always made sure I know how much he fancies me,
he has changed a lot in the last two decades, I think he is more lovely each year.
I have been having bits of my body lopped off over the last few years, breasts and things, he has been far less bothered than I am, which has been amazing, having the person who adores me, make sure I feel lovely, no matter what.
I'm really sorry you will never have that, or be able to offer it to a relationship,
well unless you alter your attitude you won't.
good luck, but it is yourself you need to have a long hard look at.