[Wolfstarr]

I am having an issue with a coworker with BPD.
She has experienced two deaths of close friends, both overdosed, very recently. I am not certain if she is an addict; however, she has been taking meds at work and I just learned today she came back from lunch after having several drinks.
She has threatened suicide and I reacted very upset. She begged me not to tell anyone, it was "told to me in confidence". When I did tell someone, she flipped out. I was visibly upset and it showed at work. I wouldn't keep her secret and when asked by my Manager why I was upset, I told her. I feel it very unfair and very disturbing that someone would ask that not to be discussed.
An email was sent out by HR, urging anyone with problems to contact the EAP.

She cleaned out her desk today before she left, making sure the person sitting next to her saw.

What I would like to know, is, what is the Borderline Personality sufferer looking for with this type of behavior? I am at wits end with this and I think I am feeling the way she wants me to feel--guilty and falling into the cat mouse game and me being her prey, being "sucked in" so to speak. She is plainly suffering but wants no help.
I would so appreciate a BPD sufferer or someone who has dealt with this to help. I want to help her but she flatly stated she does not want help. My next step is to call the police and have her Baker-Acted.

Any suggestions, help, support would be appreciated.