This bs here

My kids father and I have been broken up since October 2017. I was four months pregnant with our son I believe. I tried everything I could to keep “our family” at the time he wouldn’t even speak to me. I had a feeling he was messing with another female which I found to be true on my birthday. Anyway fast forward a few months I had the baby we still aren’t together and we barely speak. All of a sudden he’s on I want my family back type ish. I honestly had so much hate in my heart that I just wanted him to die. He’s on ft talking to our daughter and I hear a female in the back say this is __ so and so’s BOYFRIEND. I’m kinda pissed off because he didn’t even tell me I had to find out by over hearing the situation. He proceeded to dance around it when I asked if he had a gf. He says they have a mutual agreement she knows all about me. First off I think they’re both dumb ass hell but anywho here’s the kicker he lives with her!! So he’s talking all this nonsense about wanting his family, I still have his heart, blah blah while probably having sex with the next female smh. A part of me is still bothered and for the life of me I can’t understand why I even care. If I could block him and go on with life I would but we have children. Idk how to handle this situation and ps when he says that stuff I just tell him to move on he clearly doesn’t listen