Is it just me or have others experienced a BPD ex that would speak badly about friends and family and refused to do stuff with them only to turn around and seek support from the same family and mutual friends they spoke badly of and did not want to be around?
Definitely happened in my case as well. I commend you for recognizing it, it helps a lot to take a distance from this type of behaviour.
My ex would talk about how friends and family were so horrible to him. This made me feel protective of him and console him, wanting to offer my support. And then he'd turn around and say how important they were in his life, which made me so confused and almost defensive. All of a sudden, I was the one viewing things from a negative light.