i found a chapter in christopher bollas's book 'hysteria' that, in my mind, describes with accuracy the initial experience and thereafter experienced by someone suffering from hpd and the admirers they capture with thier gaze, teasing and affection...
"the hpd invites the other's seduction, and certainly many a person tries every trick in the trade to lure him or her back to life. but as the hpd believes that human seduction is sad compensation for the failure of primary erotic love, he or she seduces the other's seduction into a type of gaze - 'now look into my mirror and see how i transform your efforts into wonderful elaboration' - which removes 'each' from the realm of real engagement on to a stage to perform a part each knows only too well. both are meant to be captured by the other's internal world. even though the hysteric acts out. often involving others in a kind of ongoing event, such enactments are always vested with auto-erotic (using body as a masturbatory object) libido - onanistic passions, daydreams operating under the cloak of apparent real relations."
"this is why the hpd can suddently leave off an intense involvment with people, a sequence of emotionally significant engagements with another person - leaving the other confused, as it had seemed so promising. to the hpd, these encounters were only ever daydreams practised in reality upon actual others, who were to be seduced into intersubjective repressions: the exchanged mental contents disappear into ether, the hpd surprise upon confrontation - 'ohhh?' - a petite mort of meaning. in this surprise is the new-found libido of repression, functioning to drive each participant (the hpd and thier admirer) into self musings, wandering about in seperate internal worlds and re-imagining what has just taken place in reality???"
at least, for me this explains almost everything. i had to read it 4-5 times to get it but, i believe, it speaks volumes...