Also other posters are correct. He will come by again trying to use you.
If it helps harness your anger for power to do what you need to do.
Be angry he ghosted you. What kind of friend does that? What kind of friend uses you like that? You were good enough for him to sexually and emotionally engage with, why aren’t you good enough for a common courtesy?
Lastly, he’s done you a favor in that you now have a rare chance to slip out of his clutches to work on yourself.
He won’t ever be your boyfriend. You know deep down you can never trust him like before, you’ll know he is capable of ghosting you. It’ll be in the back of your mind always.
He will be back. I am hopeful you’ll be strong enough to not be there waiting when he does.
PS You can be overweight or whatever and still be a damn good catch. You can still be beautiful, intelligent, and everything wonderful under the sun. Your low self worth makes you put yourself on a discount… but it’s not reality. Plenty of women with extra weight have wonderful confidence and plenty of very fit women are treated like dirt.
Once you accept your full value you’ll be in the crowd of high value women of all shapes, sizes, ages, and backgrounds. It’s a crowd that you can belong to today. No weight loss needed. No bullshit game playing user men needed either, in fact they don’t even get through the door.