Insecure

I feel so insecure around my boyfriend. I used to be perfectly fine around him to issues at all. But he’s been masturbating to this girl he was obsessed over and had a huge crush on. He says he’s over her but then why does he have her RECENT Instagram pictures on his phone? Yeah she’s very attractive. But I’m the one he’s with. We’re having a child. I already don’t feel pretty because of how this pregnancy is making me look. And she’s very thin with a big butt. Like Kylie Jenner big. And all the girls he jerks off to are all skinny and I’m a whole ass 270 pounds at 5’9. I’m the complete opposite. He hasn’t even been asking me for sex lately. I feel so ugly. And I do have plans to lose weight once I pop out this baby.