Can drugs support emotional developement in personality disorders?
This question is a bit broad. The main reason it can be easily answered is that the answer is mostly no. According to a 2016 recent review:


for cluster A personality disorders, which among other things feature low empathy and social aversion there's not a lot going on regarding pharmacotherapy:



  Patients with schizotypal personality disorder have been analyzed in few small open-label studies using typical and atypical antipsychotics. There are no randomized controlled trials for patients with schizoid or paranoid personality disorder, and there is not a robust evidence about the efficacy of psychoactive drugs in these patients. 



for cluster B (which include narcissistic and borderline PD) there is more pharmacotherapy in practice, in particular for the latter:



  Antidepressants, anxiolytics, antipsychotics, and mood stabilizers are used by a significantly higher percentage of borderline patients than other people with personality disorders [...] Cochrane review found that second-generation antipsychotics, mood stabilizers, and dietary supplementation with omega-3 fatty acids have some beneficial effects in these patients, while antidepressants may be helpful when comorbid conditions are present.


They don't say anything about narcissistic PD, so my guess is pharmacotherapy is not much of much help there.


for cluster C (which includes avoidant and obsessive-compulsive) they also note briefly that



  There are no randomized controlled trials of drug treatment for cluster C personality disorders, although it can be argued that antidepressants might be of some help. Particularly, in patients with obsessive–compulsive personality disorder, use of SSRIs may be helpful, especially if anxiety is present