Hi Deliam,
I'm sorry to hear that. It's heart breaking when a loved one with bpdfamily seem completely different mood and personality wise. I couldn't talk to my ex wife because she was so hostile towards, that took several years though. Being split black doesn't happen all at once.
A pwBPD have a difficult time seeing people that can an integrated whole. A good person has bad qualities and a bad person has good qualities, the psychological term is called splitting.
BPD BEHAVIORS: SplittingI suggest read as much as you can about the disorder, you'll quickly see the benefits and become proficient over time. You're not alone. You'll find the lessons on the right side of the board.