Not BL but you could try Suicide Boy if you want a character with depression. Though people ship the MC with his male friend.
Ten Count or Serious Joke (The second couple uke deals with some serious trauma).
Ohhh its that manhwa with the sus author
Even if you don’t love me.
Season 2 has literally shown the uke talking to his psychiatrist and his willingness to get better + his vulnerability is explicitly shown.
https://www.mangago.zone/read-manga/harenai_sekai_de_kimi_dake_mieru/ - i don't remember what his disorder is called but practically he can't see faces due to heavy trauma.
Yeah gay
No gay
Do y'all know any recs for bl mangas/manhwas where one character is struggling with depression? (or any other mental disorder)