Feeling lost ..

I just so happen to look on my boyfriends search history on Facebook & seen a girls name on the top search list.. as soon as i click on her name my boyfriend snatched it away from me. I call the girl & she proceeds to tell me that he has been hitting her up and sends me all the screenshots of what he’s saying to her.. I’m 27 weeks pregnant and don’t even know what to think at this point. I live in his house i work full time but truly have nowhere I’d feel comfortable living with a new born baby on the way.. i don’t know what to do right now ☹️ i feel so lost and hurt.. he was asking to grab her butt that her titties look nice and pretty much asking for a booty call.. idk what to do idk how I’d co parent.. i don’t know what to do at all right now. All i know is I’m done and I’m not bringing up my kid in this kind of household or relationship. They’re not gonna grow up thinking it’s okay to do this. When i first became pregnant he also had sex with a girl and i went crazy about that.. but forgave him thinking that he was gonna change and things were gonna change. But i guess not..