Hi proskier,

Sorry you've found us under difficult circumstances. Obviously you feel there are some BPD traits in your relationship. Having to deal with those daily can be mentally, emotionally and even physically exhausting. We know... .and understand.
Fighting... .common theme here. Suggest reading this... .it may at least help you get things calm enough to slow down and think things through.
https://bpdfamily.com/content/ending-conflictCommunication and our own willingness to continue when things are emotionally charged simply intensifies the situation. We cannot control them, but we can control how we react to and communicate with them. That said, in the upper right hand margin of this page there are tools and lessons that are blueprints to help us do just that. Start there, and work your way towards wherever that leads you.
This place is here for knowledge, understanding, and sharing. We are here to walk with you.
Like Meilie said, the more we know, the more we can help.