<human>: Boyfriend says we cannot move out until I lose weight.

I think I've been depressed since I got pregnant, 6 years ago. And my weight's been getting out of hand. I've totally "let myself go" or whatever. Bad things keep happening, and I'm an emotional eater, so naturally I get fatter. I was about 100 when I got pregnant, now I'm 155ish? And I'm short. That's obese.

Right now, my boyfriend - let's call him Toma - and I live with his parents. The reason isn't really important right now, but we've been here almost 15 months. It's really getting me down and stressing me out. I don't think I need to elaborate on why this situation sucks. I've told Toma this much, and repeatedly, but he keeps saying "diet or we stay here". I've tried telling him that the stress doesn't help, but to no avail. He's fat himself, but whenever I say, "let's lose weight together," he declines, saying "you losing weight will motivate me to lose weight!" Laughable.

This is seriously controlling and abusive, right? Or am I in the wrong here? I'm seriously considering moving out on my own, but I'm also scared of regretting this in the future(in regards to our son). My income is bad, but I could make it on my own I think. Do you guys have any advice for me?

Can you condense the text into three sentences or less?
<bot>: Bf says we cannot move out of his parent's house until I lost weight(at least 30-40 lbs). Is he right? Am I wrong? Should I just leave him?