Welcome to the family,
You are not alone, I'm glad you found this place.
I was attacked with nasty & cruelty message which was completely uncalled for.
This is very common and you'll have to learn to face it knowing it is not about you, the more you know about her, the better you'll afront these things. It is not easy or immediate, but it gets better. Something upsets/scares her, and she reacts to that, not to you, but the only way she knows how to express it is through that "nasty and cruelty", afterwards she will be very ashamed of having talked to you like that, so ashamed she might act as it never happened. Also, the more you know yourself too. You've dealt with addiction that has some similarities with BPD, and when you have insight about your own process, and you can relate to her processes, things can improve a lot.
We all go through a face of not realizing or not wanting to see strange behavior in our loved one. No shame on that.
Take a deep breath, and start this journey, step by step. When you feel like it, start reading the section on your right that says "Basic Tools".
Does she share your religion?
Good luck and God bless.