Some tips on how to spot a borderline personality –and if you do, please immediately distance yourself.
1. They have a very obvious sadness in their eyes, frequently look as if they are on the verge of tears, and may cry in front of you - even very soon after meeting you. They will theatrically signal their depression/ sadness very quickly.
2. They hyper-vigilantly assess people very closely and intensely on meeting them. They are looking for any signs of emotional vulnerability, over which they will try to bond with you, very rapidly. They are also looking for signs of empathy, softness, kindness, which they will seek to exploit, very rapidly.
3. They are very reactive and excitable if they sense you are open to providing them with sympathetic or empathic companionship. If you give them a positive experience i.e. make them laugh in the course of some casual conversation, or compliment them, they will over react, with wide-eyed joyfulness, or their laughter will be inappropriately long and hard - they may say something like 'I haven't laughed this much in so long!'. The reactions will be intense. They are reacting to the possibility that you might be their next 'rescuer' / 'protector'.
4. The tales of woe will be very swift in coming. These tales will be very complicated, involve more than one person, and date back years. They are not looking for solutions - and any you suggest will be rejected, at first sadly and then with anger.
5. The borderline will characterise themselves as hapless, used, naive, childlike, betrayed, abandoned, bullied, tricked, abused. Not just by one, but by a number of people.
6. Their adversaries will be characterised as cunning, powerful, cruel, scheming, selfish, 'psychopaths', 'narcissists', 'sociopaths', criminals, stalkers, persecutors. liars. There will be no nuance in the borderline's portrayal of these people.
7. Borderlines seek only support and validation. No criticism, circumspection, or self-awareness will be entertained by them. They cannot cope psychologically with any attempt to persuade them that they are not a hapless victim. That is their entire identity and the basis of their entire relational style. It is how they make sense of the world. Try and shake that and you will experience borderline rage, which can be extremely destructive, even homicidal.