Hello karma74, I'd like to offer you a warm welcome to our community.

I have to admit that I don't have any children myself, but I can empathize with you as I love my niece and nephew to death and would do whatever I could to help them if they were in the same situation as your daughter. My heart goes out to you and your daughter.
It must be hard for you to see your daughter so isolated. Are there other behaviors or things she says that concern you?
I'm not sure how familiar you are with BPD, but here is a link to some information that may help clarify things for you:
Symptoms and diagnosis of BPD. Another good source of information that can help you is this article:
Supporting a loved one with BPD.
When a family member has BPD, it can affect everybody in the family, not just the person with BPD. Make sure to check out the
Parenting a son or daughter with BPD discussion board for help and support from other parents dealing with the same situation you find yourself in.
I know 3 to 6 months is a long time to wait. You may want to ask on the parenting board for how other parents dealt with this. It may depend on what country you live in and the mental health care system there.
Best wishes to you and your daughter. I hope that you find the help and support that you are seeking. From me here is a hug to you both.