But my D still texts me all day and tells me of her pain and anguish which eats me up inside.
How does your D respond to validation?
Validation works with my SO's D19, who is needy (and anxious) to the extreme. I made the decision to set boundaries for myself.
When she is staying with us (she lives with us for the summer), I am very structured in how much time I spend with her.
I have to be very intentional in telling her how I will spend time with her. For example, if I wake up on the weekend and her dad is working or traveling, I tell her that I have things I'm doing in the morning and afternoon, and can go for a walk with her at x o'clock. I find it helps to tell her, "I'm going out in 20 minutes, I'll be gone until 3pm, then I will be home and plan to get some exercise in before dinner." If we are in the same room and I have to go to another room, I will do the same thing, saying casually, "I'm going to have a shower in 10 minutes and won't be available for 45 minutes or so. We can talk when I'm back in the kitchen."
Otherwise after 30 minutes she will claim some crisis has come up that needs my immediate attention. Like the dog needs to get into the bedroom to sleep on my bed
I have had to set a strong boundary with her coming into what are now considered private spaces, like bedroom, bathroom, and home office.
I will periodically respond to texts, and never answer phone calls. Occasionally, I will respond to emails.
It could be that your friend has had to set strong boundaries because they were so eroded during the onset of their friendship. Your friend may either be unwilling or unskilled in creating structure around their interactions, and is choosing to have very rigid boundaries instead.
In Search of the Real Self by James Masterson helped me understand why it's so important to have boundaries with BPD sufferers.
With D19, she has so much separation stress, and feels depression about being unable to separate from loved ones. Not wanting to experience the depth of that depression, her anxiety kicks up, and this drives her to cling and be needy.
She needs help handling the necessity that separation is a given -- it will happen -- and feel some success getting through the abandonment depression that separation triggers.
I see my role as one of maintaining a firm, and gentle boundary (separation) while acknowledging her anxiety and depression (validation) and make sure there is structure so she doesn't completely dysregulate (fear of total abandonment.
It's a balancing act, for sure.
If I give in to her neediness, it only exhausts and frustrates me, and then I'm no help to her at all.