Thanks everyone for the feedback.
It's a bit hard to explain. I've known most of these friends for years. And I guess its' becoming one of those situations where we KNOW we care about each other and love each other, and that is unquestioned. But in a way that's almost a bad thing? Because the pressure to show up and make that effort is not really there, as it would be for someone who is still proving themselves as a new friend. Now it's become, "well I can't make it to this thing, BUT YOU KNOW I LOVE YA! I'll catch you next time!". Does that make sense?
And it sort of defeats the purpose of having best friends, because friends are supposed to be those people you can always rely on. I'm not saying that an occasional cancellation is unacceptable. I have a life, I know stuff gets in the way of our best intentions sometimes. I am more upset because I feel like that sense of importance for being there physically for one another isn't as strong anymore. And that the fact that we know our friendship is "solid" takes away the need to hang out regularly. It's so strange.
I don't know what to say to my friend whom I fought with this past weekend. After she cancelled so many times, I simply asked her not to make plans until she is sure she can make it. She got so mad. But then apologized and PROMISED that she would come to my art opening last night. Did she come? NO. Some "emergency" came up and she apologized and said she couldn't make it. I'm just turned off. But again, she's a best friend, like a sister, and I don't feel like this should change our friendship, but I've come to the realization that she is not someone I can rely on. How do I move forward without getting disappointed when she cancels, or growing apart?