People who suffer from BPD are more likely to fall and stick in a toxic cycle with narccissts. This is well documented and from personal experience I can testify this. There are even some mental health facilities/rehab facilities that separate diagnosed BPD and narccissts because it is commonplace they find each other and BAM the toxicity begins. 

Tell me your experience on dating a narccisst, how did you get out? 


I'll leave this here because I find it interesting 


Lachkar proceeds to describe the intricacies of each pathology and to demonstrate how different practice paradigms are needed for successful treatment: the narcissist responds most profoundly to the mirroring aspect of self-psychology, while the borderline requires the containment of object relations theory. Lachkar demonstrates how both theoretical constructs can be intertwined during the course of treatment to provide effective marital therapy.

“It is recommended that the technique of mirroring, empathy and introspection can be blended with an object relations approach to help these narcissistic individuals deal more directly with their internal deficits and areas that contribute to the maladaptive nature of their relationships. When couples can face their internal deficits, they feel more secure and contained. For borderlines suffering from abandonment anxiety and preoccupied with the lack of maternal bonding and attachment experiences, self psychology is not enough"