At Tor.com they tagged eight sci-fi & fantasy books that center mental health, including:
A Darkly Beating Heart Lindsay SmithRead about another entry on the list.
After a failed suicide attempt, teen Reiko is sent to her family in Japan to learn to get a handle on her emotions. Unexpectedly, she is sent to 19th century Japan while visiting the historic village of Kuramagi. In the 19th century, Reiko lives as Miyu, a young woman that gives Reiko’s anger and hate a run for her money. When Reiko discovers the secret of Kuramagi, she must come to terms with Miyu’s personal demons as well as her own. Reiko has anti-hero vibes about her, which piques my interest even more.
--Marshal Zeringue