Maslach's Three Dimensions
Psychologist Christina Maslach spent decades studying burnout. She found it has three distinct components:
Exhaustion means you're drained physically and emotionally. Sleep doesn't fix it. Morning arrives and you're already tired.
Cynicism is the detached, negative attitude toward what you're doing. "Why bother?" becomes your default thought.
Inefficacy is the feeling that you're not accomplishing anything meaningful. Even small tasks feel insurmountable.
The Student Version
You're already exhausted from school, coursework, and social obligations. Then application season adds another 20-hour-per-week project on top. Your body starts shutting down non-essential functions (sleep, appetite, relationships) to conserve energy. This makes everything harder. So you do less. Which makes you feel like a failure. Which triggers more exhaustion.
The cycle.
How to Break It
Pick three things you're not giving up. Sleep. One friendship that actually feeds you, not the group chat you mute every other day. One hour a week of something you enjoy that has nothing to do with applications. Once you've picked them, you guard them. Even when the deadlines feel like they're piling up to the ceiling.
Anything that takes less than 20 minutes: just do it now. The reply, the form, the message you keep staring at. Not later, not after one more tab. Now. The little tasks you keep "putting off until later" don't take much time, but they take up headspace. They sit in the back of your brain and drain more energy than actually doing them would. Get them out of the way.
"No" is a full sentence. You don't have to follow it with "but" or "I'm sorry" or "I just can't because." If someone needs an explanation before they'll accept it, that says more about them than about you. Save your energy for what actually matters to you.
If you've gotten to the place where sleep is broken, food doesn't matter, or you catch yourself not wanting to be here: that's not something you fix by being more organized. That's burnout, and it's asking for help. Talk to a counselor, a therapist, a parent, a teacher you trust. You are seventeen. You don't have to figure this out alone.
You are not a machine. Rest is not weakness.
Sources
Maslach, Christina, and Susan E. Jackson. "The Measurement of Experienced Burnout." Journal of Organizational Behavior, vol. 2, no. 2, 1981, pp. 99–113.