Going through a lot right now

So my baby is 8 months old my bf said he doesn’t love me anymore so I moved out we lived with his family. Now I’m back with my family he’s been going out fucking bitches drinking while I’m over here with our baby then on his days off he takes our baby so he can spend time with him. It’s sad because I want shit to work out still but he doesn’t want to be with me all I want is for our family to be together I don’t want us to split up this is the hardest thing I’ve ever gone through....he’s almost 27 he needs to grow the fuck up and take care oh his family he’s the father he should want this shit to work out. He took me to his house last week I spent the night idk why and he would fuck me in my mind I thought everything was good then I see his messages with his brother he’s like hey I’m over here at this restaurant and I got bitches with me if you wanna get laid hit this bitch up and get over here he’s like ok I just got off work. Me and our baby were there that night