A person with BPD is all over the place, a complete trainwreck with a personality that shifts so much that it can put off even their close friends.
I tried my best to be a friend of bint, but time and time again the trainwreck personality put me off. I figured it was my lack of tolerance and this is true, but knowing a person who was a lesbian one day, straight another and THEN claimed she had AS one day made me think "what the fuck?".
EDIT: Wait, she came back? What happened to all the "baw I'm leaving for good"?