My friend keeps cancelling on me. Should I keep inviting her places?

Canada
August 10, 2007 8:21am CST
One of my very good friends always cancels and/or reschedules plans with me at the last minute. I would say one out of every three times she will cancel, regardless of whether I invited her or she invited me. The last one was the worst bc she asked me to invite all of our friends for a girls night out then she cancelled the day before and asked me to reschedule. I said I could not reschedule everyone but I would organize another event when she was available. She gave me a date, I scheduled another night with everone and, guess what? She cancelled that one too! It is getting very tiresome and even though she is a really good friend, I do not feel like making or accepting plans with her anymore. Should I dump her for good?