What made you realize that this person is most likely a narcissist?

For me, it was the constant lying, the pathological lying that my ex put me through. I never experienced that kind of dishonesty in any of my other relationships (and I've been with toxic guys), but this was at a whole other level.

The second was the continued denial of cheating despite the obvious proof that he did cheat on me. Denial, denial, denial. My life coach said it best "They pick odd hills to die on".

What made you realize that the person in your life wasn't just toxic but a narc?