Hello happyseeker,

I'm sorry that your heart is breaking over your relationship with your sister. That she keeps dropping out of treatment is sad, but sadly, that is her choice.
You sound like you've educated yourself well on BPD. If it helps, the Lessons and the Suggested Reading at the top of the board have info which may help additionally.
What is your relationship like now, are you close by? Is there any other family involved?
Turkish