I have to say though, your dramatic post made me laugh.
I have no intention of giving up - I've come so far that I'm not about to let a bit of his paranoid fear stand in my way
I read your thread. The trouble is, you aren't DETACHING properly. Detaching does not always mean physically detaching. You can physically be in the same space as that person BUT if they say hurtful things, you have the ability to SWITCH OFF.
Just validate everything she says whilst keeping your wall up.
Think of those science fiction films, you know, where they had an invisible force field? Well, just visualise an invisible force field around you and imagine her words are just bouncing off you - she has said them, you have validated them, but they can't affect you.