I'm really glad you haven't responded. You're worth better than the way she is treating you!
Unfortunately, I have a strong feeling that in the next week or two she'll contact you (because she won't like you 'ignoring' her...) Then she'll try and make another date for you to meet, which you will probably say 'OK then' to. (I would do, and have done!)
Then she may turn up, but if she does - she'll cancel on you next time. She is keeping you where you belong (in her eyes.) At her beck and call, and there to see you when she can be arsed.
I know this for a fact because I've got a friend that does this to me!
I've known her for 35 years. We go back a long way ... And just like your friend, she's always got some drama going on. With one of her four children, or one of her 3 siblings, or one of her 10 nieces and nephews, or a problem at work, or with her husband ... ALWAYS something wrong in her life! ALWAYS a drama, and sooo many cancelled meet-ups with me!
I would say she cancels roughly two out of three meetings of ours - and we have to rearrange it again ... Also, I'm always the one to get in touch with her. Because when we leave each other after a coffee or a pub lunch, she always says 'you contact me next, as you know what I'm like.... I am always sooooo busy...' Basically a copout to stop her having to be arsed to contact me.
I got sick of it - so over this past year and a half, I stopped getting in touch first. Actually, I secretly hoped she wouldn't bother contacting me again. But after a few months, she messages and says 'let's meet up!' and we arrange a date, and she often cancels. Then 2-3 weeks later she messages and says 'let's meet, how about next Friday?!'
Every time I try to ghost her, she just gets in touch after one and a half to two months and says 'let's do lunch!' I'm finding it really, really hard to break free! I'm so weak. She brings nothing to my life! I wish I could properly ghost her. Doesn't help that we know a few of the same people. She - and they do live 12-15 miles from me though, so I wouldn't see them often, but I do go to that town 2-3 times a month so may bump into one of them - or her!
I'm sick to death of her . Lets me down every five minutes. Rearranging stuff and cancelling, and her constant life dramas. I just wish I could ghost her completely but I can't seem to do it. It's really hard. You have my sympathy. 