Hello, tontoy! Perhaps I can offer you some advice, regarding your question?
I will start off by saying this.
I am eighteen years old. I graduated last June, am currently attending my first year of college, and, overall, feel more at peace.
This, fortunately, all happened because of a decision I made three years ago, to cut all contact with my mother. She does not have my phone number, has not seen me in my place of work, and has no way to contact me regarding social media. I, quite truthfully, could not be any happier.
Cutting contact with her not only has given me a chance to better myself as a person, as well as to heal from the abuse, but, it has also given me the opportunity to see her illness for what it is, and to know, personally, that she can't help this.
I, too, forgive her for what she has done. However, I still wish to stay away from her.
If she does not wish to seek out help for her illness, she will not change. We cannot force someone who has been diagnosed with BPD to seek out help.
Give it time. That is the best thing I have done regarding a family member who has BPD. Counseling will most definitely help in the meantime, but realize, that cutting contact will most certainly help in the long run, in the sense that you can heal, as well as look at the situation with a clearer mind. It will be tough, but a lot of things are.
Talking helps. Thinking helps. You and your husband are good people, I do not doubt that. You both will make it through this

I wish you a wonderful year.