AITH for telling my friend I don’t want to make plans anymore?

I have a friend who often cancels plans at the last minute. I understand that things happen, so I didn’t say much the first few times.

Recently we made plans for something I was really looking forward to, and they canceled again a few hours before. I told them I was tired of always being the one waiting and I didn’t want to make plans anymore.

They said I was overreacting and should be more understanding.

I don’t want to end the friendship, but I also feel like my time isn’t being respected.