Boyfriend uninterested

I feel like I don’t satisfy my boyfriend anymore. We’ve been together for almost 4 years and in the beginning we used to have sex so much I thought my vagina was going to break. Now when we have sex which isn’t as often. Maybe 2-3 times a week sometimes less. it feels like he gets what he wants and then forgets I exist. I’m 31 weeks pregnant tomorrow so my body image is garbage right now anyway but this was going on before the pregnancy. He swears he still loves me and finds me attractive but it feels like he can barely look at me. What do I do at this point? Wait it out and see if it bets better after the baby?

edit: the amount of sex we’re having isnt the problem. the problem is after he is done, he rolls over and goes to bed or gets on his phone and doesn’t talk to me much, as I said its like he forgets I exist.