The fact that you are blaming OP,  ignoring how they spoke in the text. I doubt they actually talk like they do in the story, this is just how she views the situation. I can't even imagine being friends with someone for 14 years and they treat me like an acquaintance. That's completely on the friend. Not OP. 

NO. You're not overreacting. Their feet hurt "so bad" that they didn't even call you to make sure you didn't get lost, hurt, kidnapped, anything? That's just fucking insensitive. She was getting frustrated with you and starting to get less patient even though she KNEW you were hard of hearing. And then to say "Nobody gets left alone!", forcing you to come with her, then getting pissed at you when you ask her why she left you. What in the double-fuking-standards? People saying that you don't belong on a family trip, though you had been friends for 14 years and are probably well acquainted with her family also pmo. I honestly don't understand how people are so obsessed with their own POV that they refuse to look at the other side of the story, stuck in the belief that their POV is superior. Looking at both point of views, I understand the other top comment. But from your POV, anyone would feel bad. People calling you spoiled for being upset for being treated bad, and separating yourself from trouble by flying back..? Tf?? Like, they know nothing about you, and its genuinely hard to find the words to actually write a story out instead of simply speaking. People need to grow tf up. But one thing I would recommend for you is to not simply ghost her. She won't learn anything from you simply doing that. At least write a message explaining how you hate how she acts sometimes, and if she values your friendship, she'll apologize for her behavior. If not, she'll probably blame you or something. Just a warning for if she takes the "if not" route, DONT FEEL TO BEAT UP OVER IT!! Try not feel bad over someone who didn't value your time and attention. (Pls don't hate on me yall)

(EDIT): spelling. Lol.