How do you deal with a Narcissistic friend?

All you and your other friends can do is try to ask her as calmly as you can why she keeps upsetting others, and why she does it.

If she can't or won't see that, and change her behaviour then really she's left you no choice but to cut her off.

I have. Narcissists are all about themselves. The only thing that matters is that others love them like they love themselves. And it will always be something they put down anyone that disagrees or did not fancy them enough. They tend to project their shortcomings onto another even if you just watched them they will deny it. They are usually mega liars and often violent. If you were married to them and did everything they asked they would still cheat and put you down. There is no cure. If you are dear friend you can try to talk if you are sentimental friends just because you have known her so long let go . The therapy is talk therapy. I don't know much about that. I have my own narc and talk therapy on a group seeing just send s like an oxymoron. Just be on guard when you are around her.

Yup..,
I knew a guy I use to call friend for eighteen years and finally kicked him to the curb.
It hurt me to do so and was always there for him, always.

Think he knew I finally had enough of his selfishness eventhough I never uttered a word.

Understand another angle too, her annoyance on not getting invited.

I don't see why would I have such a person as a friend in the first place. It's far worse to have a relative like this, hard to cut them off.

If they're narcissistic there's no middle way. Cut them off and don't open the door again, ever.

You drop them. Why would you want to subject yourself to this?

Easy. Narcissists don't have friends. So drop them.

Yes. A Narcissist is not a friend.
Yes, cut her off with no explanation, that's my advice, but you have to mean it and not re-engage later.

I think as you described what she did when they didn't invite her.......... you just nailed WHY they never asked her to come.

WE accepted him because his wife was my wife's best friend. Fortunately, they moved away and she divorced him. She is now back here and friends with my wife again. We never saw the narcissist again. Before they moved, we occasionally had to call BS on something he said or did as a result of his narcissism. It had no effect, of course.

Don’t cut her off . She’s very unhappy in herself

How is that "narcissistic"?

Why be friends with them?

I just let it go

One - don't ask SW as the hundreds of armchair philosophers feel they finally have an out in expression. I swear, trained in agreeing with the OP (you). I'll give a feasible option, is there a reason she feels cut off?

How is that narcissistic? Have they been "clinically" diagnosed or you just labeled her that?

There's something else going on under the surface. Somehow she feels left out or rejected maybe.

Me:

why would you be friends with those loveless creatures?

Thankfully, I've been able to put distance between myself and the narcissists in my life. It took me a while to conclude that one of them was so--but apparently, he was trash-talking me to everyone. HIGH drama wherever he went. I backed way off, the way your friends are, and that was that. We were never "enemies" per se and I'm still FB friends with him, but that was it.