<human>: Can you give me a shortened version of the text?

I'm 29. He's 32.

Background: We were married when I was 18. We have two daughters together. When he was in his mid to late 20's, a work-related incident happened. It left him traumatized and unfortunately ended up suffering from PTSD (diagnosed). We had a happy marriage until then. At this point, he began drinking heavily, screaming and yelling at me and the children (he only once became physical against me), not coming home until late if at all, and openly pining for death. I begged him to continue treatment through his work, he refused. Things at home became more unbearable and his behavior erratic. Eventually, I filed for divorce.

Fast forward to a year after we divorced. He has lost his job, spent some time in a mental institution, and spends all his money on alcohol and marijuana. He asked me to give him another chance, I refused. The next week he's on a plane moving to the coast.

He's been there for quite a while now. He has not come home to visit, does not pay child support, and calls the children maybe once a month. He does, however, call/text/email me pretty regularly and it usually ends with me saying get help and him saying I should move out there because my place is with him. I can't handle it anymore. I've got my life together. I have a boyfriend. I'm finishing my master's degree.

What I really want to know is this:
I don't want him in my life anymore, but I know if I say that, he will cut off all contact with his girls and I'm worried that it will crush them. What can I do? Or is it better just to have him completely out of their lives?
<bot>: my ex-husband is crazy and I want to know if keeping him in the kids' lives is even worth it.