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/kono_koi_wa_hoshi_ni_wa_negawanai/
https://www.mangago.zone/read-manga/kimi_to_tsuzuru_utakata/
https://www.mangago.zone/read-manga/run_away_with_me_girl/
https://www.mangago.zone/read-manga/haru_and_midori/
https://www.mangago.zone/read-manga/ohana_holoholo/
https://www.mangago.zone/read-manga/oniisama_e/
https://www.mangago.zone/read-manga/living_will/
https://www.mangago.zone/read-manga/kago_no_shoujo_wa_koi_wo_suru/
https://www.mangago.zone/read-manga/huijin_huayuan/
https://www.mangago.zone/read-manga/yume_no_hashibashi/
https://www.mangago.zone/read-manga/have_a_great_trip_after_the_credits_roll/
https://www.mangago.zone/read-manga/this_love_that_won_t_reach/ (age gap, MC is in love with her sister-in-law;rushed and ambiguous ending)
https://www.mangago.zone/read-manga/the_story_of_a_person_who_grew_a_flower/ (short story; age gap, teacher-student relationship;hanahaki disease)
https://www.mangago.zone/read-manga/to_die_in_june_one/ (read the last two chapters here: https://www.mangago.zone/read-manga/to_die_in_june/)
https://www.mangago.zone/read-manga/shiroi_heya_no_futari/ (one-shot)
i have alot of pent up stress and i really need to just cry so pls recommened me some tear inducing mangas it can be any genre it just has to be really sad