Truth revealed after birth

G

So my bf of 8 years walked out while I was pregnant. (My first child his 2nd ) He said he wasn’t doing anything during the break up (lies). Just to find out he was in a relationship while I was pregnant. The girl called me and told me everything 1 week after I gave birth. She knew about my pregnancy early on, but she thought we were only co parenting. Well she only believed what he was saying because she was falling in love with him. She is heartbroken to find out he is a liar and never fully left me. They were in a relationship for 2 months. She also got an abortion while I was 9 months pregnant however she didn’t know who the father was. In November, he told her he wanted to be a family with me again. Everything hit the fan once I had our baby January and he wasn’t responding to her. I’m sick because I had unprotected sex with him a few times towards the end of my pregnancy. He claimed he got tested before returning to me. He told the female lies about me just to make her feel good. I don’t appreciate that at all. I’m completely done at this point. Moving on was fine, but discussing personal business especially about the baby shower is flat out a low blow. Did he really have to drag my name and character? For what? When he still won’t leave me alone