How would you feel?

So I was on my boyfriends phone and I searched my name in his messages just to see if there’s anything he’s saying to anyone or just to see if I’d fine anything interesting lol. Well while we were together in 2019 on Valentine’s Day (there’s been other things too) and two days before my birthday he told someone he was with me bc he was “lonely and it’s something to hit.” And proceeded to talk about another women he’d like to “wife her up” and how hot she was. When I asked him why he wanted to be with me when we got back together he said it was bc he loved me but he was also saying stuff like this about me. We just had a baby and we are supposed to be getting married in a few months. I know it was a while ago but it really hurt feelings. I don’t know if I should just get over it bc it was a while ago or see this as a red flag.