When I met him I was in a really bad place
You were just what he was looking for. He could appear to be your saviour, would convince you that's what he was, while grinding you down to where you are now.
I’ve never felt good enough for him
Because that's what he wanted you to feel. He made you that way. Intentionally.
everyone is going to laugh
I doubt it. If they do they're arseholes who don't deserve your time. They'll likely roll their eyes at the fact loverboy's turned his attentions to the next one. Then they'll watch her diminish the way you have.
I wish he saw more than just my weight.
Oh, he does, dear, that's why he is the way he is. It's the fact that you are everything he's not - kind, caring, loving, etc - that he uses the thing that bothers you most to grind you down, that he needs you to be ground down, so he can feel better about himself. It is intentional.
for my husband and a man I’ve been with for 5 years to tell me he feels nothing just means he has no feelings
This is truer than you probably realise. Yes, he has no feelings, he is unable to feel what normal people feel, that is why he behaves the way he does. When he appeared loving at the beginning he was just playing a part, he was mirroring you. To him, no matter who or what he is shagging it is just a vessel for him to masterbate into. It's not love in any way shape or form, not on his part. He is an empty vessel, when it comes to feelings. He can't understand them, that's why he has to try and break your spirit, in the hope that the only feeling you will have left is one of sorrow.
He is not a good daddy. Good daddies don't treat their children's mother the way he has treated you.
It's hard just now @VividScroller , cry if you need to, wrap up in a blanket, get outside for some air, take the thing out of the drawer that you hid away because he didn't like it and put it out in pride of place. If you feel like contacting him, do something else, re-consider that thought half an hour later. If you feel like contacting him, do something else, re-consider that thought half an hour later. If you feel like contacting him, do something else, re-consider that thought half an hour later. Don't contact him, it will get easier. It'll take time, but you will get there 