Boyfriend hates my pregnant belly😭

So I’m 18 and 34 weeks pregnant and I’m carrying very small. You can’t really tell I’m pregnant if I’m wearing a loose shirt and I used to wanna be big but now my boyfriend is constantly making comments and faces at my belly. He calls me a cow and laughs about it and he says he can’t wait until I lose the belly. It hurts my feelings so much because I love my belly. My baby is in there and I think it’s the greatest thing. But I also feel really gross at the same time. I don’t feel beautiful at all and I just wish I did so bad. How can I get out of this funk?😭