What do you think about me wanting o fly home early on the family vacation my parents paid for.
Why do you want to hurt their feelings by wasting their trip?
Because I want to show them that I'm independent and free of their control. Just because they paid for this trip doesn't mean I need to stay here the whole time. I'm sick of being around them and want to be on my own again.
I understanding wanting to feel independent, but your parents paid for this trip for all of you to enjoy. You should be grateful and have fun with them! If you leave now, they will be upset and I think you will regret it in the future because of all the fun you could have had if you stayed.
Well, I would rather be a bitch and leave instead.
Rather than leave the trip entirely, why not just take some time to yourself while on the trip? Take a couple hours to be by yourself away from family. That way you can feel recharged and refreshed!