My friend always canceled plans last minute so i started doing the same to her
had a friend who would cancel on me constantly. like text me an hour before we were supposed to meet. "omg sorry something came up." every single time.
so i stopped putting in effort. next time she invited me somewhere, i said yes then canceled an hour before. did this three times.
she finally called me out. said i was being flaky and unreliable. i just said "i learned from the best." she got quiet. we don't talk much anymore and honestly i'm okay with that.
TL;DR: Friend always canceled on me. I started canceling on her. She didn't like it.