From just your brief description it is hard to say. It appeared that this was a strong possibility. I will reprint the criteria for NPD from the "bible" of mental health diagnostics, the DSM-IV and you decide for yourself:
Diagnostic criteria for 301.81 Narcissistic Personality Disorder
(DSM IV - TR)
A pervasive pattern of grandiosity (in fantasy or behavior), need for admiration, and lack of empathy, beginning by early adulthood and present in a variety of contexts, as indicated by five (or more) of the following:
(1) has a grandiose sense of self-importance (e.g., exaggerates achievements and talents, expects to be recognized as superior without commensurate achievements)
(2) is preoccupied with fantasies of unlimited success, power, brilliance, beauty, or ideal love
(3) believes that he or she is "special" and unique and can only be understood by, or should associate with, other special or high-status people (or institutions)
(4) requires excessive admiration
(5) has a sense of entitlement, i.e., unreasonable expectations of especially favorable treatment or automatic compliance with his or her expectations
(6) is interpersonally exploitative, i.e., takes advantage of others to achieve his or her own ends
(7) lacks empathy: is unwilling to recognize or identify with the feelings and needs of others
(8) is often envious of others or believes that others are envious of him or her
(9) shows arrogant, haughty behaviors or attitudes
You are not doing anything wrong. This is the way narcissists control others, but makin them out to be the bad ones, the perpetrators, while they play the part of the victim, when in reality it is the other person who is the victim. You are HER victim and she does not care how you feel about her treatment of you (she has no empathy).
This is classic narcissistic behavior - and they usually will not/cannot change.
Don't let her get to you, or at least don't let her see that she is. Each "victory" propels her to repeat the same "successful" behavior.
God bless, and thank you so much.