When you break up with a gaslighting narcissist do they generally stay away or do they let it go?

I’m asking due to the articles I’ve read that they don’t allow breakups to stop them from trying to get back with you. I also read it’s hard to shake one out of your life. Just want to understand what I’m up against moving forward
When you break up with a gaslighting narcissist do they generally stay away or do they let it go?
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