Hello
jmi303 and

I'm so sorry for what brought you here, but I'm glad you posted. You will find many other parents who can relate to what you've posted, relationships with a pwBPD (person with BPD) are similarly intense, though all are unique.
Like you, I didn't fully accept my DD25's BPD traits at first, I hoped she'd mature, gain a new perspective. She was diagnosed in 2011 and I have only recently begun to accept and understand her limitations.
As you say, learning about boundaries is so very important, as is not taking their behaviors personally. I'm glad you are here - you are not alone. Some of the parents here are also estranged from their adult children/grandchildren.
I hope you take advantage of this site, there are so many great articles here and, most importantly, others walking similar journeys. Feel free to jump in and post in others' threads, it's a comfort to us all to know that we are not alone, that others care.
What led to the estrangement? How are you coping? Do you have any outside support?
Sorry for all the questions, it helps to get more information so we know how to best support you. We are here for you, we get it better than anyone else does.
Again, Welcome! I hope to hear more from you - what's working and how you are navigating this new relationship with your D.
~ OH