Boyfriend calling me fat

My boyfriend keeps making remarks about how I’ll be fat here soon when I show more. It hurts my feelings so much. I’ve asked him to stop once but he didn’t. Here’s what I sent to my friends about it:

“He’s made rude comments about my stomach lately when people ask if I’m showing yet. Like pretty much just calling me fat. When we were at Walmart he and his friend mentioned something about maternity pants. I think it was just me mentioning I have maternity pants and His friend was like “oh yeah I forgot you’re pregnant lol” and he was like “well she doesn’t need them all she has is just... stomach” and me and his friend both were like “excuse me” because we knew he was just calling me fat. And he keeps talking about how I’m gunna get fat and shit and it’s really making feel like shit”

It’s just been really difficult having to hear that. I’ve been made fun of for my weight for as long as I can remember. Even when I wasn’t heavy. I was a normal size and people still called me fat. It’s just really hurts me