<human>: Give me the gist of the text in a nutshell

So my boyfriend (32) has a weird way of putting on weight. It all goes to his torso, and he looks pregnant, while his arms and legs stay thin-ish. He is INCREDIBLY self-conscious about this, but the relationship gut has been growing in the last 2 years.

I don't mind or even mention it at all, of course I would love it if he had a toned body, but I'm attracted to him anyway. What annoys me is that every single day he's pouting at his belly in the mirror, saying how gross and ugly he feels, and that I deserve a hotter guy and should leave him. No matter HOW much I try to reassure him that I love him and point out I wouldn't be having sex with him every day if I was grossed out by his body, would I.

When I try to solve the problem by encouraging him to go work out or do some sit ups to get the flat stomach he wants, he gets really defensive and turns it around on me, saying, "I knew it, you think I'm fat, you're not attracted to me anymore! You're going to cheat on me with a hotter guy!"

I'm like, what.

What am I supposed to be doing here?
<bot>: boyfriend fat, doesn't want to be fat, doesn't want to work it off, gets insecure and angry at girlfriend, girlfriend confused.