If you're okay with GLs, try these:
Unrequited love:
https://www.mangago.me/read-manga/kono_koi_wa_hoshi_ni_wa_negawanai/
https://www.mangago.me/read-manga/sasameki_koto/
https://www.mangago.me/read-manga/unrequited_love_skill/
https://www.mangago.me/read-manga/futsuu_no_koitte_nani/
https://www.mangago.me/read-manga/aoi_hana/
https://www.mangago.me/read-manga/yuri_na_kataomoi_chan/
https://www.mangago.me/read-manga/omoi_no_kakera/
https://www.mangago.me/read-manga/watashi_sekai_o_kousei_suru_chiri_no_you_na_nani_ka/
https://www.mangago.me/read-manga/kimi_koi_limit/
https://www.mangago.me/read-manga/gunjou/
https://www.mangago.me/read-manga/shinyuu_ni_sukina_hito_ga_dekitarashii/
https://www.mangago.me/read-manga/this_love_that_won_t_reach/ (age gap, MC is in love with her sister-in-law; rushed and ambiguous ending)
Love triangle:
https://www.mangago.me/read-manga/kono_koi_wa_hoshi_ni_wa_negawanai/ (a guy and a girl are in love with the same girl)
https://www.mangago.me/read-manga/my_brother_and_i_are_rivals/ (a guy and a girl are in love with the same girl)
https://www.mangago.me/read-manga/uso_no_tsukenai_otoshi_goro/ (a guy and a girl are in love with the same girl)
https://www.mangago.me/read-manga/slightly_sour_secret/ (a guy and a girl are in love with the same girl)
https://www.mangago.me/read-manga/sankakkei_no_kowashi_kata/ (two girls are in love with the same girl)
https://www.mangago.me/read-manga/futsuu_no_koitte_nani/ (two girls are in love with the same girl)
https://www.mangago.me/read-manga/alter_ego_1/ (two girls are in love with the same girl; SEQUEL: https://www.mangago.me/read-manga/alter_ego_2_noel_june/)
https://www.mangago.me/read-manga/kimi_no_love_wo_misetekure/ (girl A loves boy, boy loves girl B, girl B loves girl A)
https://www.mangago.me/read-manga/i_wish_her_love_could_come_true/ (girl A loves girl B, girl B loves boy, boy loves girl A)
https://www.mangago.me/read-manga/nanashi_no_asterism/ (girl A loves girl B, girl B loves girl C, girl C loves girl A)
https://www.mangago.me/read-manga/savior/ (girl A loves girl B, girl B loves girl C, girl C loves girl A; toxic relationship)
https://www.mangago.me/read-manga/yuri_no_hajimari_ha_dorei_kara/ (girl B loves girl C, girl C loves girl A)
MC is in love with someone else but ends up with the FL:
https://www.mangago.me/read-manga/level_one_dreamers/
https://www.mangago.me/read-manga/i_love_amy/
https://www.mangago.me/read-manga/shoujo_manga_protagonist_x_rival_san/
https://www.mangago.me/read-manga/bad_thinking_diary/
https://www.mangago.me/read-manga/itd_would_be_great_if_you_didnt_exist/
insane potential for a GL ngl
So as the title says I‘m in love with my best friend. She’s very touchy and we’ve made out and kissed (while we were drunk) so i just assumed that she kind of reciprocates my feelings. Turns out she doesn’t but i still love her and it hurts. But she’s kind of hurt too cause her alleged best friend likes her so I‘ve taken some sort of stability ig? I don’t know what to do.
Can someone recommend a manga like this so i can suffer even more? Thanks!!