I would like to join the others in welcoming you.
Self-care is really important. And, as
TH said, learning all that you can about BPD will help reduce some of the pain and stress involved.
You said that you had to walk away again when the raging resumed. Perhaps we can help you see other ways of handling those types of situations in the future so that you won't feel that walking away is your only option.
What you are describing when you talk about the victim, the persecutor, and the rescuer is the
Karpman Drama Triangle. Learning how to escape that is one of the things that I'm talking about.
I look forward to reading more of your story. Let us know how we an best support you.