How to enjoy a vacation???

I am going to Yosemite National Park for the first time for vacation. But I am not looking forward to hikes in the hot weather and the great outdoors. My friends are doing stuff without me and I want to stay home. Also, another family is joing us so the parents will be together and my brother will be with thier kids. Nobody is my age and I won’t have anyone to talk to. How can I enjoy it?
I don’t have a choice to go or not. And I need to “participate” in the activities.
No friends are going with me and I can’t stay with them.

Don’t ruin it for everyone else. Either stay home or find a nice shady tree to park your butt under for the week.

The park is gorgeous. Enjoy the quiet solitude or try making a friend your age.