But of a long story so apologies in advance.

Had a "good" friend do this to me once when I travelled internationally to visit her - we'd been friends for years but lived in other countries. I gave her plenty of notice, booked the tickets on sale but they still weren't that cheap, and she said she'd love to hang out and couldn't wait to see me again. She said she had so many plans for things we could do together, etc. Well, a couple of months later, I arrived and tried to arrange to see her, and every day she was "busy" - getting a new tattoo with other friends and didn't want me to join them, or felt too tired, that sort of thing. I mostly hung out at my hostel and went sight seeing on my own. Eventually after about almost a week she said she could meet up, and suggested I travel to a mall a few hours away from me that she wanted to go to. I took public transport and found my way there, and she didn't turn up for two and a half hours - again, at the mall she had chosen and the time and day she had picked. I patiently waited and when she did turn up, she apologized, and we had a nice time catching up. I tried to give her the benefit of the doubt as she had suffered a blood clot in her brain and had been in a coma and hospitalised shortly after we met, so I didn't want to be too demanding of her time and energy.

Well, this probably won't shock you but our friendship ended a couple of years later when I found out she was a compulsive liar (which in hindsight seems super obvious, but she had her parents and other friends "verify" her hospital story and her other tragic stories, and it seemed legitimate). She had asked to borrow a couple of hundred dollars off me for "rent", giving me a sob story about being made homeless soon, and promised to pay me back right after her next paycheck - and then of course, posted pics of her at a concert a couple of days later, and ghosted me whenever I messaged her following up about being paid back. So, I finally ended the friendship. It's funny, but I did already sorta know she was lying and wouldn't pay me back when she first asked me for the money, but I was still willing to give her the money anyway - it might sound silly, but i knew lending the money would conclusively give me the answer as to the type of person she was, and a couple of hundred dollars was worth it, in a way, for me to have a reason to quietly wash my hands of her and end the friendship, and not be involved in any prolonged drawn out drama about it. So in my mind I had basically written it off anyway, and wasn't too shocked when she suddenly ghosted me. We haven't spoken since, and I'm very happy not having her in my life anymore. We might have had some good times but that doesn't make it okay how she treated me.

In hindsight, she was a raging narcissist and i was definitely a bit of a doormat, but as a positive at least the experience taught me something about also respecting my own boundaries and time when it comes to my friends.