Observe Don't Absorb technique from Ross Rosenberg.
"The goal is for the codependent to simply watch or observe the narcissist. As they do, they are not connecting effectively or emotionally to them. They are simply observing."
https://www.selfloverecovery.com/blogs/blog/observe-dont-absorb-technique
He also has a YouTube channel.
Ross Rosenberg was one of my first YouTube teachers as I was coming Out of the FOG. His work is solid.