sad yaois that will you make you cry?

Cut (and pretty much anything else) by Kawai Touko
http://www.mangago.zone/read-manga/cut/

http://www.mangago.zone/read-manga/life_senjou_no_bokura/

http://www.mangago.zone/read-manga/kimi_no_yume_o_mite_iru/
http://www.mangago.zone/read-manga/kashikomarimashita_destiny/
http://www.mangago.zone/read-manga/tamayura_yuki_ringo/
http://www.mangago.zone/read-manga/kowagaranai_de_soba_ni_ite/
http://www.mangago.zone/read-manga/goshujinsama_toke_dama/
http://www.mangago.zone/read-manga/haikyuu_usotsuki_canon_doujinshi/
http://www.mangago.zone/read-manga/mou_ichido_nando_demo/
AAAAAAAAAAAAAAND this one, the first yaoi manga that made me cry from my heart
http://www.mangago.zone/read-manga/complex_manda_ringo/

Idk, but I cried for one called Itou-san, and if you're interested in reading it, it also has a prequel called Episode: 0
I think.
It has a bittersweet/happy ending.(づ￣ ³￣)づ