I think that when you're a teen, you can be overwhelmed with change. You're expected to be ready for adulthood, to know what you want to do with the rest of your life, to have mature relationships. But it's only been like 2.5 years since you had braces, or got your period, or stopped playing with Barbies! So I think it's easy to retreat into apathy and fear and to not try. Because trying means you can fail and be embarrassed-and those are two things that are literally the worst when you're in high school...