Hi Yorky:
I'm so very sorry about your situation with your daughter
We too have had an eventful year watching our daughter disintegrate in front of our eyes. After a few rough years She was finally provided with a diagnosis of BPD. This brought a mix of feelings; relief that now there was something to explain , and complete horror , the horror that every piece of information tells us that we had abused our child, our child who was always cherished and loved.
Rest assured that abuse is only one possible situation with BPD. There are many other scenarios. BPD rarely stands alone, and everyone with a BPD diagnosis has a little different situation in regard to symptoms and possible root causes.
People with BPD typically are struggling with other forms of mental illness. Some common ones are: depression, anxiety, bipolar, ADHD, OCD and others. In some instances, there can be genetic traits or neurological conditions that can be passed on.
A lot of people with mental illness go undiagnosed and/or untreated. Sometimes, if we think about it, we can pinpoint someone on one side of the family, or the other, who shows some sign of instability (i.e. relationship problems, drug or alcohol abuse, difficult to get along with).
If you go to the "Parenting Board", you will see others with similar circumstances. They have been loving and supportive parents (no abuse). Unfortunately, you can't love away mental illness.
It could be helpful to seek your own therapy, with someone who understands BPD. It's not your fault. A qualified therapist could help you realize that, at this most difficult time.
Best Wishes.