Hi used2baShyFilly ,
Are you able to set boundaries? While living with my wife, I wasn't. Because the house is small, we don't have an extra bed, and I work from home. So she could keep harassing me all day if she wasn't happy with something. Because boundaries must be enforceable, but I could not enforce anything while living together.
The fact that you have succeeded with some types of counseling is quite surprising. Usually, couples therapy does not work when one of the partners has BPD, so they have to go through individual therapy, but it must be specialized.
My wife has been to different therapists, but it didn't last much. Recently I asked her if it was because she felt criticized. In response, she remained silent and just shook her head, but I noticed she was angry and felt like crying but tried to conceal it. It seems like she was holding deep shame. This is why pwBPD need specialized therapy, such as DBT, which doesn't make them feel like "an all-wrong person." You can understand this better from the words of Marsha Linehan, who created it:
https://youtu.be/bULL3sSc_-IYes, talking to our partner won't be enough to make them change at all, because this has roots in their biology, but change is possible with specific treatments. So I still have hopes for the future.