Genetics, brain abnormalities and environmental factors are

Genetics, brain abnormalities and environmental factors are all associated, according to experts, with the onset of Borderline Personality Disorder.
Environmental factors include history of childhood abuse, neglect and separation from caregivers or loved ones.
Do you relate to this? Can you recall a childhood event/s that could have been a strong factor leading to your BPD?
Are there others with the same or other mental disorders in your family?

I don't know about brain abnormalities as i haven't done a brain scan, but i can strongly relate to the other two factors which are genetics and environmental factors..
I've got three cousins who i know now that are suffering mental issues.. One might be schizophrenic, another has seasonal affective disorder and the third cousin i'm not so sure about.. The case that is more important to me, however, is my sister who has been diagnosed three years ago with Bipolar disorder.
For the environmental factors.. I think it's also related to my sister and the way she has treated me in my childhood and early teenager years.. she might have been only diagnosed relatively recently .. But the signs of a troubled person has shown on her since very early in her life .. Perhaps even in her childhood.. She grew up to be a very disobedient, rude, aggressive and angry teenager. When i remember those days i can recall how much i was - mainly - emotionally and less often physically abused by her.
I completely loss confidence and became a scared little girl. I saw my father punishing her for her bad behavior and my mother feeling terrible at times because of her. It only made me feel worse. It's only when she went to study abroad that her mental disorder got seriously out of control.. She came back to live with us and now she goes to the psychiatry every now and then for her medication.
Nobody however knows about my BPD. I only recently realized my problem even though it had always shown that i have troubles controlling my thoughts, anger (less angry now but more depressed) and feelings in general. So that's all about my story i guess.
I wanted to know if someone else could relate as well.