i'm not normally a poster on this board either...i have a child dx w/emerging bpd (also mdd, odd). she is 13 yrs. old.
it is a common theme...the dx of bipolar in kids w/bpd. i'm NOT SAYING YOU HAVE BPD...i am pointing out that as nons...we can catch fleas
from being in an unhealthy environment and thereby show the symptoms of bpd...having said that...it is far far too common for anyone under 18 to be diagnosed bipolar instead of borderline...they don't like to make that diagnoses until the personality is fully formed. hence my child has the "emerging" diagnoses.
while i am so sad to hear that your parent is bpd...i am even more glad that you are NOT! congrats on getting away and getting healthy!