Vindi,
Unfortunately, I was only told that my sister "has some mild depression & anxiety stemming from personality disorder" so we don't have a BPD diagnosis or any specific type of PD for that matter. That said, the information on this website including the links you provided, is spot on. On the other hand, when reading the brief descriptions of PD types on the Mayo Clinic's website
www.mayoclinic.com/health/personality-disorders/DS00562/DSECTION=symptoms I would say Histrionic & Dependent types fit best, and maybe Avoidance and some signs of Borderline. So all these types and terms are a little confusing to me. The article on Helping a Loved One, including the linked article by Xavier Amador, was helpful except Amador's suggestion to use the phrase "I understand how you feel" - in actuality I don't think there's any way I can truly understand how she feels and making that kind of statement is a little scary to me, like I may be giving an invitation for her to manipulate me. In regards to how I feel about her not accepting the PD diagnosis, it makes me sad and her/our struggle plagues me, especially now that we are older and we only have 1 parent left, I feel the burden is now on me to make sure she's o.k. and I have concerns about her child.
Being Mindful,
From my perspective, my sister has had the kinds of signs/symptoms described on this site for as long as I can remember, or something akin to these signs & symptoms, but there was never a mental illness diagnosis, our parents just knew she had low self-esteem. As an adult, she sought help on her own for depression.