I have a friend who keeps cancelling our plans. In the last month she has cancelled 3 times. It’s frustrating because she waits until just before to cancel. Sometimes her excuse changes when she tells the story. Should I confront her or ignore her?

Ignore her.

Just don't invite her to anything, anymore.

If she gets around to asking about it, just tell her honestly that she is unreliable when making plans so you don't plan on inviting her anymore.

That's kind of rude.

If she does it to others ...well that's her personal flaw. Explain to her how that makes you and the others feel that she is unreliable.

If she just does it to you, then it says something about your friendship. Tell her how you feel. Then if the problem continues, stop making plans with her. Cut her off.

I see it as a serious problem, considering your repeated disappointment and the waste of your time.  I would discuss it with her.  If she doesn't see how important it is, it would probably be best to find a companion who does.

I would talk to her and ask her what is going on. If she is canceling plans with everyone, she might be suffering from depression and just needs someone to talk to, or need someone to guide her into seeking professional help.

If it is just you she is canceling on, you need to find out if you offended her in some way and she hasn't found a way to tell you. Or you need to find out if she is just using you as a back up plan in case something she thinks is better doesn't come along.

No matter what is going on, talking to her is the only way to get to the answer. You can decide from there what to do.

You need to talk to her. Ask her what’s going on then decide if she gets another chance.

Try a mild confrontation---If her actions are due to anxiety / panic attacks, you might just ask her why she keeps canceling and how the issue can be fixed..

This may just be temporary, but it is certainly annoying