I miss the person suit she was wearing when I met her. I understand cognitively that she wasn't that person but it is hard to really emotionally let it resonate that she wasn't that person.
I don't think it is helping to think of her as an alien in a people suit.
She was very real and complex and wonderful and hurtful.
We all wear a image mask when we meet someone - she wore one that was thicker and she wore it longer. We all mirror our love interests in the being, its part of the bonding process. She went further than most. I could go on, but you get the idea. BPD is a disorder of emotional extremes.
There's a lot here in this one statement.
I understand how you feel scarred. Me too. But I believe it is within us to heal.
Good avenue to pursue