Reliable?

I must have a sticker on my forehead that says "Cancel on me." I have no idea why, but there are certain individuals in my life who feel free to cancel plans on me whenever they feel like it, at the last minute even. To top it all off, they don't even care that I might have turned down other invitations to go places and do fun things with other people because of said plans. Nope. Makes no difference to them. They apparently couldn't care less that their lack of consideration basically wipes out my day. Thanks guys. Appreciate it.