Friend Over Backward

A friend agreed to dogsit while I flew up to visit my ailing dad. She bailed at 7 p.m. the night before I flew out, saying she needed three days to pack for a vacation. She never even apologized. I don't want to be friends anymore. She said, "You're throwing a friend away over not watching your dog." But it's not that. It's that she broke her word and left me in a huge bind. Still, I feel bad about cutting her out of my life, as we've been friends a long time. Thoughts?

--Disgusted

This is like that game Trust, wher...