Would you take them back?

So I was with my baby dad for 2.5 years. We have a daughter and a baby on the way. I’m super early but not the point.

I found messages from him to a girl saying how he will sh*g her up his wall really disgusting messages. Saying his single and me and him been single for a while. I instantly ended it and then an hour later my ‘best friend’ decided to only tell me his been sexting her and sending nudes saying his in love with her. She’s been holding this in for weeks. My worlds upside down. Idk how to feel and don’t know what to do 😭💔