In every marriage there are two needs:
Physical sex and mental interaction.
Most people can handle the raw sex side of it, but some and I say far too many can't handle the mental side of it at all.
You said your self, that you have some overweight. I bet, the husband will not be looking for overweight ladies in the net!
I have been through similar life and now on the divorce stageses.
My ex looks after her figure, but is mentally selfcentered.
We lost the mental connection years ago and I can't revive that no matter what.
Circumstanses led to a situation, that divorce is the only way to end it.
She has shown signs lately, that she made a mistake, but she woke up too late.
Financially we both are as good as finished. Sad to say.
So wake up and start fixing your life while you can................NOW !