Again, if your doctor or therapist has diagnosed you as a narcissist, it is very difficult to learn new behaviors. How many years have you been in therapy and is it DBT? Cognitive behavior therapy is not effective. You should also be in a DBT group therapy as well as individual therapy.

If you are expecting your narcissism (if it has been truly diagnosed and not a self-diagnosis) to be "cured" that will never happen. You can learn ways in DBT of mitigating the damage you do to others that might enable you to have 2-way fulfilling relationships after a LONG time of being in therapy. Not just months.

In that vein, if you are expecting others who have known you to suddenly see changes in you or treat you differently, that won't happen for years because if you have damaged them in the past they will always have that mistrust in you, that you will eventually say or do something that is self-serving or designed to hurt them in some way.