if you're like me and love diving deep into shit and wanna get fucking down and dirty with BPD, peer at it's guts, especially if you have it, watch some Sam Vaknin

Worlds most reasonable self proclaimed Overt Narcissist/Psychopath, we don't judge here okay, I'm BPD in recovery and his work was ESSENTIAL for me to untangle my soul. it is what it is; and that's his attitude too. I encourage you to watch even if this concerns you, just extract the valuable mechanical understanding he provides and discard the rest; i.e use your frontal lobe.

But what he uncovers through his videos is that all cluster B exist on a spectrum, starting at psychosis, moving over the "border" into "borderline" then into narcissistic personality structure/defence and finally raw psychopathy.


TL:DR;
THERE IS NOT TYPE CONSTANCY BETWEEN CLUSTER B DISORDERS, WATCH SAM

disclaimer: I'm borderline so regard this post with that preface and judge what you do from there.

(i recommend starting with the bellow video: It's a deep dive and starts very broad, so buckle up or ignore, but if you have a comfy evening ahead and feel scholarly, you're in for a real treat.)
https://www.youtube.com/watch?v=-THt5sJ5VE4