ff. feel u man
An uncomfortable truth is a recent webtoon which had quite the sad ending so it's completed.
There are lots of one shots though in the tragedy tag if you just search.
Sorry, I didn't read your post properly as my suggestion isn't yaoi.
Life senjou no bokura
Inheritance of aroma
I bawledu eyes on that one ╥﹏╥
i dont know but i wanna be sad af can someone recommend me some sad yaoi shit that really can make my heart cry out that it makes my heart broke and hate the villain or i dunno i just want to feel sad dang what is wrong with me