Do people’s true colors show around friends?

My man was on FaceTime with his buddy and I asked him what he wanted to eat and then he told me to shut up and then said to his friend “her ass is flat and bony as fuck i don’t even know why I’m with this bitch” then they both laughed. But I’m confused because he always kisses me during sex and calls me beautiful and how he’s lucky to be with me. I was shocked and felt sad when he said that but I don’t know if I should take it seriously or not because I heard most people aren’t their self around their friends and they try to impress them.