Wayner, I'm glad you found us!
And let me just say how happy I am to hear how much you want to support your daughter. You'll find many other parents here who are like you and want to learn the skills and tools needed to be the best support they can be. I only wish all people suffering from these misunderstood illnesses had someone to stand by them.
How old is your daughter? Is she aware of your thoughts about BPD? If so, what are her feelings? If she has a desire to work on the issues that cause her problems she can do quite well, and even if she's not to that point yet, the skills and tools you can learn here will help you communicate in the most effective ways.
Here's a short article about BPD, and if you can read it from the standpoint of a parent it has some great, basic info:
Facts About Borderline Personality DisorderAlso, I love this video:
Video-What is Borderline Personality Disorder? It had a lot of "ahah!" moments in it for me. Does it fit what you've been dealing with?
Again, I'm glad you found us--this is a great place to learn and to grow.