I think my ex is a narcissist
How did you come to that conclusion?
I heard my ex telling his parents how he doesn't want to be with me.
If you have broken up, then you should move on and not judge others. You cannot diagnose people with mental conditions just because things did not go your way.
You sound like a narc.
I don't think I understand, are you saying that I'm a narcissist, or someone who is going to tell on you?  Either way, I think that you are throwing names around without concern for what others may have even done, and the point remains that you should just move on from your ex.  If he no longer has feelings for you, then he is not worth the effort that you put into worrying about him.