My baby is 6m old and he’s now wanting to take responsibility?

I need to vent because I’m worried sick. I can’t sleep. I left when I was 8m pregnant. He didn’t help me at all other than taking me to get an ultrasound. He was horrible to me, has anger issues, ignored my 3 year old when he tried to talk to him because my baby’s father was mad at me for not having sex with him while my toddler was laying right freaking next to me, and I caught him lying to his mom for money. I found out he wasn’t paying the mortgage for 5 months. Yet he was buying video games and lotto tickets. I was doing all the housework while pregnant, even mowing. (I was high risk) So many other things, I don’t want to type it all out, but I haven’t slept at all because I’m worried about my children. He hasn’t bothered to take responsibility when I was in the hospital. He knew when and where I was having the baby. Why should he get to choose when it’s convenient for him to be a father? It’s been SIX MONTHS. I had to get an apartment, move my stuff, save every dime I had to move out on my own. My therapist even told me it was the best option for the kids that he isn’t in the picture because of his narcissistic behaviors. I don’t even ask for child support because I don’t want him to hurt my kids.