Traits of BPD

Is self-sabotage one of the things that is part of this disorder.

no, but it's a symptom of borderline personality disorder.
however, it doesn't mean that someone who engages in self-injury has it.

when i hear the voice, suzie, she tries to convence me of things that are not true, but at that point i can't go back to my mind, and i have learned that i cut and hit myself because i'm trying to hurt her.