Katie knows there’s stuff that makes her different. She’s homeschooled, she has freckles, and her teeth are really crooked. But none of these things matter to Kacey. They’re best friends forever—just like their necklaces say. But when they go to summer camp, Kacey starts acting weird. What happened to “forever”? And when Katie gets home, she can’t stop worrying. About getting braces. About sixth grade. About friends. She knows tapping three times or opening and closing a drawer won’t make everything better.…But sometimes it helps stop the worrying. Is something wrong with her? And will anyone want to be friends with her if they find out?