Hi Celeste,
Welcome! It can be very challenging living with someone with BPD.
What kinds of concerning behaviors is your daughter exhibiting? What have you tried so far to make it easier for the both of you to get along?
While I'm sure this is stressful, you've come to the right place for understanding and support. There are many other parents here who are living with their children with BPD, and you'll find support and advice from them. To get started, this information may be helpful for you:
What can a parent do?.
Hang in there, and please keep posting. We'll help you through this.
-GG