Aita for asking my husband to leave?

In January, I (42f) asked my husband (45m) to leave. He did have the opportunity to stay, but that would have meant he stopped talking to the women he worked with and removed them from his social media. Here is the backstory. My husband has always struggled with finding a job. He is possibly autistic and has ADHD. I have always helped him, as we met when I was 18 and he was 21. We had been together for 23 years and married for 15. I would take care of all the applications and anything like that, as he wasn't confident and would always ask me to help. I did because I loved him. I had finally gotten him to start trying for management. I regret it now. He got a job at a restaurant but needed his safe serve. I helped him study, and he passed with a 95 on his practice and 85 on his real test. He started his job, and that is where he met them, particularly her. Let's call her Sarah. He had been working there for a year when they hired Sarah. We had just moved into a new apartment, and it was awful. Lots of mold, and I got sick. I was sleeping a lot and didn't understand why. I was a stay-at-home mom, and he was working all the time. He was never home, but I was always home. We were both sick, but because he would spend time away from the house, he was better than I was. I didn't know, but he started taking Sarah home, and he even lent her my car. The horrible thing was CPS showed up at my door. We have a daughter who was 12 years old at the time, and they came to my door saying they needed to investigate due to posts my husband had made. made on a site the wouldn't tell me about. They said he was being investigated. I cooperated because I needed to know too. They said my daughter seemed fine and that they had no proof. During this time he spent a lot of time with Sarah and kept saying how she believed him. He had to stay out of the house for a month. Also we moved into a new place. We didn't know if he would be moving in with us. He said he would move us and then if everything got worked out he would move back in. He said he hadn't used the site in a while and I thought maybe someone hacked it and gave him the benefit of the doubt. So he ended up coming home. I found out from my neighbors that he had her there the three days before my daughter and I moved in and she was in a nighty. They thought my husband and Sarah were a couple. I am sure they slept together. He denies it even though they admitted to sleeping in bed together. He said she was under the covers and he was on top. I was sick. Still the betrayal of sharing a bed with another woman. I tried to be friends with Sarah but she kept interfering in my husband's and I relationship. She even kissed me and so did her mother. Sarah is an alcoholic and drinks first thing in the morning. She talk to my husband about his mom dying and what they will do with the money once she is dead. I didn't want any money from his mom. I wanted his mom. She and I have never really gotten along but I respect her and think she is and incredible woman. She doesn't like me. I think because I am Mexican. They say no but Sarah is white and his mother loves her. Yes he introduced her. Also when we told his mom about cps she said it was my fault and Andy hadn't been happy in a long time. After trying to be her friend for a bit I said no more. The way they were together made me uncomfortable, and when I saw her lying on top of him on the couch, I was done. They said it was just a hug, but she had to push herself up and off of him. After that, I told him I needed him to cut contact with Sarah. He refused and said if I left him, he would be alone and didn't want to "Be. Risk it." I said, "Okay, then I need you to go. If you can't take all the women off your social media, then you need to leave." And he left. My best friend also took his side and said, "At least I would be number one." I didn't want to be number one.. I wanted to be the only one. He left and hasn't helped with anything really. He barely talks to his daughter or sees her. He talks to Sarah and her family everyday. Oh he also called Sarah his soulmate and her family his other family. I desperately want a divorce but ot is 5000 and he left me to pay everything on my own. He made a fool out of himself and took her to his fast food job after everything went down. They new me and two of his coworkers told me he was cheating. He got fired. He was fired from his resturant job for inappropriate employee relations. ​ he has been gone for 8 months now. Aita for asking him to leave? Also I can't afford to stay in the city I am in. I want to go home. He says he will never see Amelia if I go. I don't get why he cares? I thought he would be happy and free then and can focus on his other family now. Why try to help us stay? Why say you want us to stay? Why not just let us go? Any advice or perspectives would be much appreciated.