He doesn’t want sex with me

Before I was pregnant me and my bf use to be at it constantly !!! And we still were until my belly has started to pop out I’m 20 weeks pregnant and I’m starting to get bump now but Iv gone from constant to like nothing I’m feeling down about this situation as I’m starting to feel unattractive his friends gf is also pregnant and his friend was saying I don’t like doing it while she’s pregnant and he agreed but I’m needy when it comes to sex 😩🤰🏼