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No. The current theory is that narcissists are born or made at an early age-either born with a damaged brain that does not allow them to develop into an emotionally mature adult, OR they suffer childhood trauma that harms their development.
There is nothing you would be able to do or say that would make a normal person turn into a narcissist, or a narcissist become a normal person.
What you may have experienced is the period of time called the ‘love bombing’ or ‘honeymoon’ phase of a narcissistic/abusive relationship, in which a narcissist was able to hide their true self behind a mask for a brief amount of time in order to gain your trust.
Please do not blame yourself if someone you trusted has become abusive or disrespectful. Narcissists are master manipulators. It is easy to believe the best of others if you are a normal person who has never been harmed by a narcissist before.
If you are being abused or mistreated, take steps to protect yourself and leave the relationship as soon as you can. Do not trust the person with any more personal information.
Editing to add: Posts tagged 'quora' were originally my answers to peoples' questions on quora.com. They were monetized but I am giving them away for free here.
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