I didn't tell my best friend of 14 years I was moving across the country and I left without any notice
Why did you leave without letting them know?
I don't know if she even cares about me, so why tell her.
I can understand your concern, but it is nonetheless very impolite to leave without saying farewell to your friends. It hurts them and they might never want to talk to you again. You should reach out to them and clarify what happened.
I don't care about that. I just care about getting away.
Usually people tell others when they are moving away. If you don't do that people will worry about your welfare.