Hello, Purged
I would never say that someone with BPD who is very low-functioning would never be able to be helped; my own adult (37) son was diagnosed with Low-Functioning BPD in April 2013 (and he really was low-functioning at that time), and with the proper treatments and Therapies, he is doing very, very well. So, I do believe there is
always hope for someone who knows he/she has a problem, wants to get the help for it, and then goes through with taking advantage of that help and participating fully.
I think the reason you haven't gotten any replies to your question is because this Board is for romantic partners of someone with BPD--spouse, boyfriend, girlfriend, etc.--and you've told us that this woman is your friend? Friends, as opposed to someone you have a romantic relationship with, are different in that you may not have any leverage or ability to help them get Therapy or to change the way they live their lives or look at things... .
When you are living together, have a marriage, have children, or live apart but are still in some sort of a romantic relationship, the dynamics are quite different, and the tools & techniques given in the
links to the right-hand side of this page might work differently than in a "friend" relationship. Have you checked out any of those links? Another good Article is here:
Getting a "Borderline" into Therapy, and you should find some insights there that could help you with your friend. Even if she never goes to Therapy, the tips there are very useful for a relationship with someone with BPD.
Do I have the circumstances of this relationship correct? Am I missing something?