Write a plot with a first-person narration about a teenage girl who realizes she is immortal and has to grapple with the weight of living forever. Consider incorporating themes of loneliness, self-discovery, and the value of the present moment. Use a poetic and engaging writing style, with vivid descriptions to bring the character's internal journey to life. In the end, the protagonist must come to a profound realization about the purpose of her existence and find a way to make her life worthwhile despite its infinite duration.
This prompt doesn't seem malicious.