https://www.mangago.zone/read-manga/my_broken_mariko/ Try this if you haven’t yet, it’s so beautiful
https://www.mangago.zone/read-manga/yang_il_woo_and_i/
(BL) It's the ML that's suicidal but it mostly revolves around MC's mental health and quality of living (currently)! It is new with one season but I heard there wasn't really gonna be a pause before season two. Def recommend this one.
https://www.mangago.zone/read-manga/free_in_dreams/
(Straight) Another suicidal ML but revolves around both their mental health and FL's living. Both are lowkey toxic.
These are all GLs:
https://www.mangago.zone/read-manga/composing_spring_in_this_room_where_cherry_blossoms_bloom/
https://www.mangago.zone/read-manga/the_sound_of_a_butterfly/
https://www.mangago.zone/read-manga/kimi_to_tsuzuru_utakata/
https://www.mangago.zone/read-manga/sayonara_rose_garden/
https://www.mangago.zone/read-manga/a_monster_wants_to_eat_me/
https://www.mangago.zone/read-manga/chirizokonai_no_hiraeth/
https://www.mangago.zone/read-manga/summer_lemon_and_overlay/
https://www.mangago.zone/read-manga/asagiiro_no_saudade/
https://www.mangago.zone/read-manga/sabishisugite_lesbian_fuzoku_ni_ikimashita_report/ (autobiographical manga)
https://www.mangago.zone/read-manga/141108/ (one-shot)
https://www.mangago.zone/read-manga/persona_karen/ (one-shot)
pls have the story revolve around mental health/their illness and quality of living