The teen years are a time when people ask the big questions of life. It’s a time when people figure out who they are and how they want to belong to the social world. One way people do that is by thinking about different scenarios and trying out different behaviors and feelings and even friends. Everyone wants to be special in some way. The problem to solve is how to accomplish that and still be someone others want to have as a friend. It’s often a time of huge turmoil with lots of emotional ups and downs. Because of all this, it’s not at all unusual for teens to meet the criteria of a narcissistic personality disorder. But it’s what is called a “false-positive.” According to the DSM-5, in order to be diagnosed with a personality disorder, a person has to have “an enduring pattern of inner experience and behavior that deviates markedly from the expectation of the individual’s culture, is pervasive and inflexible, has an onset in adolescence and is stable over time.” You simply haven’t lived long enough yet to have an “enduring pattern” or to have developed a personality that is pervasive and inflexible.
Rather than seeking a diagnosis, I think you need to be doing the work of a teen — figuring out how to make friends and deciding the direction for your life. Giving yourself a label isn’t going to help you do that. In fact, even if you have a label, you still have the same challenges everybody else has. If you can’t start figuring things out, maybe you want to see a counselor for a while to get some direction.
I wish you well.