While looking at a response to a question on Carolyn Hax's WaPo column on Facebook, I found this website called Out of the FOG.
https://outofthefog.website/
It focuses on dealing with relationships involving someone with a Personality Disorder. Some good tools are provided.
That's my reading for the week sorted now, thanks!
Thanks for telling me about her. She's one of the reasons I so love FB. Well, that and Nonna Pia and her old Italian cooking!