I thought my best friend came on our family beach trip to be with me, but yesterday I found out she and my older brother secretly planned the whole week to film staged TikTok couple pranks. She used me as an excuse to get invited. I feel completely sick and betrayed. Am I crazy for wanting to pack my bags and just take an early train home?

You aren't crazy at all, but don't let their selfish behavior chase you away from your own family trip. What hurts so deeply here is that you were treated as an access pass. Your genuine excitement was reduced to a cover story for views, and having your brother play along makes the sting twice as sharp. Instead of fleeing, shift the dynamic without giving them the drama they probably thrive on. You don't have to pretend everything is fine, nor do you need to be their audience. Pull your friend aside and be blunt: "Finding out you only came here to film content with my brother makes me feel completely used. I'm going to do my own thing for the rest of the week." Then do exactly that. Lie on the beach with a book, hang out with your parents, or explore on your own. Let them stage their fake reality while you enjoy the actual sun. You can figure out what’s left of this friendship once you're back home.