Fam, you've done everything right, everything and not engaging is exactly how it should play it - don't feed the crazy.
Anxiety is a terrible affliction and it's easy to internalise it, to think it's part of your personality - but it's not, it's a terrible terrible external syndrome.
The way you've handled this is ALL you and who you really are.
A strong, dignified, brave, witty, kickarse woman.
I'm in awe.