I'll never forget the first time that a piece of artwork literally blew my mind. It was one of the most amazing feelings. I saw this work and had a physical reaction whereby I felt as though the artwork represented exactly how my emotions felt. How could some artist who didn't even know me capture me feelings and mood?
Realizing you aren't alone and that your feelings and thoughts have merritt based on the idea that others experience similar emotions as you do, means a lot to a 15 year old. And I'll never forget it.
Find some artwork, go to a museum and see what happens. Maybe you'll find yourself moved or inspired. It's possible!