Hi simon514,
I wanted to join BrightDayMom in welcoming you.
It's heartbreaking what this disorder can do, not only to the person suffering, but to the family who loves them. I'm so sorry for the pain you must feel.
As you say, good friends are not likely to understand, and they probably
are extremely uncomfortable. One thing I learned is that my friends are not therapists, they don't have the skills nor the experience to walk next to me. They are still friends and need some direction from me.
For your friends, could they be feeling some shame? If so, that may be the emotion that causes them to turn away more than anything. Shame because they are not strong enough for the kind of support you need. You may need to be the emotional leader on that front, if you can. That might mean acknowledging to them that you recognize the challenges, and want them to do xyz to protect the friendships. Whatever xyz may be for you.
One of the relationship skills I learned from BPD books is that too much deep conversation can be emotionally arousing, and while that observation is directed toward BPD sufferers, the skill of stating your truth and then moving on can apply equally to friendships. They want to be there for you and support you, and they don't know how. Letting them know what you need, how you feel, and recognizing at the same time that their skills will be limited allows them to be what they are: good friends who care. Therapists and people here can bear witness to your pain and then you can go have a good time with friends
You may be right that 30 days is not enough. The upside is that there is a dx and she is getting treatment. The book Buddha and the Borderline (worth reading) points out that some people get the dx and are never told! The woman in that book spent a decade not knowing why her relationships were so unstable, why she suffered so much, why she felt the way she did.
It's a long road, and it can be exquisitely painful. My mom used to say you can only be as happy as your saddest child, and that is saying a lot for mothers who have BPD children. Even so, learning to communicate with your daughter as she struggles to heal can in itself be very healing. I see the world so different after learning about BPD, for the better.
There is a grieving period, and everyone goes through it in different ways. For me, I realize my son is on the boundary between special needs and high needs. Like your daughter, he is gifted and talented, and it is a terrible tease to see such divergent paths for him. I really had to grieve and let go of the vision I had for him and meet him where he is at.
Do you have other kids? Is your family engaged and helping you?
Keep posting. It really does help
LnL