Okay, time for a male to "weigh" in on this. I speak too straight sometimes, but straight talk is easiest understood.
He is a wretch. He does not deserve you. My wife is overweight, and she is just as beautiful to me now (or more-so), as she was 15 years ago (when she was thin). She never makes me feel bad for being overweight....I do enough of that to myself. Again, he does not deserve you.
Shallow! Shallow! Shallow!
So, will he "love" you again, when you lose weight? Will you ever be sure?
So, if your child becomes overweight, will he stop loving that child?
I never encourage divorce.....but, you know, he makes me want to tell you to file. Instead, I will encourage marriage counselling. HE needs it.