Try not to be bitter and angry. If you are, do so in your own space and not around the narc. All it does is feed their need for attention even if it is negative attention. Perhaps they will come back with their tails between their legs ACTING as though they have really really “seen the light” THIS time. They will play every card – sympathy, remorse, desperation, blah blah bleech. Just leave them be and be happy you are no longer blind to their bullshit. Do. Not. React.
– From someone who learned the hard way.