If you want to make your story one that people could relate to, I suggest you add drama. Depends on how you envisioned your character, if it is a high school story, you can talk about failed relationships, fake friends, and a lot more… 
As for the whole stories about dealing with mental health and depression, I personally believe it is important to bring more awareness to these subjects.
People need nowadays to know more about the importance of being mentally healthy and if authors could actually bring that throughout a story without it being too offensive to some readers than I guess, well why not? 