Hello
SdimhelpWelcome to the group. You have come to the right place for reliable information, help, and support. How did you find out your daughter has BPD? How do you feel about it? How do you think she will feel about it once she finds out (which I am assuming she will)? It is quite an adjustment. I am glad you reached out to us.
You ask specifically about boundaries so here is my "go to" article on that subject.
Setting Boundaries I hope it helps. I look forward to hearing more from you, whatever you are comfortable sharing.
Hugs
Faith