Dear Sunflowercb4,
Welcome !
On these boards a lot of people know what you are going through. We all have one or more loved ones with BPD in our lives. So I am happy you reached out !
Have you read up about BPD ? There are a lot of good books, like 'Walking on eggshells', to name just one of them.
Have you heard about FOG (fear / obligation / guilt) ?
https://bpdfamily.com/content/emotional-blackmail-fear-obligation-and-guilt-fogI cannot tell you what to do. I know however what I would do (and have done in the past). You are saying you have children. For me, leaving was speeded up by the fact I have a daughter.
In my personal opinion we can only heal from the abuse we went through if we install NC (no contact). And NC really means NC, that is, no visits, no phone calls, nothing. It means, time to focus on just ourselves (and of course our children if we have them), and heal. There is a whole life waiting and moving on is really possible.
Having been with BPD/NPD, I know how they sometimes mess with your brain. In the end I had the impression I was turning and turning in circles. I couldn't see clear anymore. I also forgot to just *feel*. Actually that's not entirely correct, I had never learned how to feel. But that's another story.
When you stop thinking for just a moment, how do you, deep down feel ? Do you want to keep investing in this person who you left already ? Do you want to keep dragging yourself through all of these troubles, that would obviously still be coming ? And with you, your children ?
It's ok to feel, and to make decisions from there. They are actually oftentimes the best decisions I think.
It's also ok to think about ourselves. It's actually very natural, only some people don't do it enough.
What do you think ?