Borderlines are incapable of intimacy which leaves loved ones and family members – non borderlines -experiencing borderline push-pull which can be crazy-making. By the very nature of BPD, borderlines as the result of their defense mechanisms of splitting, projection, and narcissism, can’t help but push-pull. When those with untreated Borderline Personality Disorder try to get close to someone – attain emotional intimacy – they immediately fear engulfment so they push away or push the non borderline away.