
Hi pocan_again,
I'm sorry to hear things are difficult. You have big decisions you're contemplating. Divorce is difficult, even more difficult with a pwBPD. I suggest that you take a look at the
Legal board to get an idea of what your getting into. It's not to say that it's not a good idea and you won't get custody, it is to say my it's emotionally difficult and it's a good idea to have a strategy in plan.
A quiet exit and we have information on the site as well. If your spouses fear of abandonment is triggered, it can be scorched earth. Not fun. I've been there. I told my ex I wanted a divorce, knew nothing about BPD and triggered her.
A good book I suggest ( only one of it's kind ) is Bill Eddy's
Splitting; Protecting yourself While Divorcing a BorderlineDivorce is a serious step, disordered or non-disordered. I didn't want my kids to be raised in divorce either, S3, S6, D8. I wanted to keep the family unit together. Protect and shield the kids. Being on this side of the fence, many are divorced. I also think it wasn't good for the kids to be blasted by mom. I provide an emotional safety net in my house, a calm and secure environment unlike the war zone we had when we lived together. I tend to their emotional needs, validate and show them simple strategies to cope in a way they understand (D8).
It sounds like your SO is railing against your boundaries when you decided that you wanted to involve family. I can relate to this as well. Does she act out more aggressively to your boundaries?
Mental illness and BPD is complex. I tried to explain to family and my advice is, it's best not to. Much of the behavior and acting out is behind closed doors. Does she keep things together around family? It is your marriage. Don't talk to family about family. Her disorder is not a burden for you to explain why she does what she does. The boards here a resource you can use. We all have a loved one with mental illness in our lives.
Are you in T?