Hi Almighty,
I'm sorry to hear that. I have read accounts from some members where BPD traits surface after a life event or very stressful period. 30 years is a long history, it must be hard to see this change in your H.
BPD is a persecution complex where the person believes that their circumstances are caused externally by somebody else. A pwBPD will project their feelings feelings on others. To answer your question about if he's going to change, it depends how aware is he? Does he sense that there's something off? Does he want to help himself?
BPD BEHAVIORS: Projection We're glad that you have found us. Many members here can relate with you and offer you guidance a.d support. It helps to talk to people that have a family member, partner , friend that suffers from BPD.
I suggest to read as much as you can about BPD. The behaviors from a pwBPD can feel like crazy making behaviors to the non disordered partner. It helps understand why a pwBPD behaves the way that they and we have r/s tools that I can help you. You'll find the lessons to the right side of the board.
You're not alone. Welcome to the family.