http://www.mangago.me/read-manga/not_for_the_faint_of_heart/
I wanted to recommend December rain but then I saw you already read that one, this one also made me cry
Boy meets Maria (this one made me cry)
Back in time to you
Tale of the yellow dragon
It’s not the same as 10 years I loved you or December rain but it will make you cry it is little on the bitterSweet side.
https://myreadingmanga.info/etwo-raise-no-yakusoku-promise-next-life-osomatsu-san-dj-eng/
read this and feel the sensation (•‿•)
Kinda http://www.mangago.me/read-manga/until_i_meet_my_husband/
Meh kinda sad http://www.mangago.me/read-manga/this_ending/
If you haven’t already done so http://www.mangago.me/read-manga/given/
This one is kinda sad. I got dragged with the characters emotions and cried too lol
I haven't read the ones you've read so idk but this is something.
http://www.mangago.me/read-manga/adam_no_rokkotsu/
Recommend me the most sad bl manga/manhwas you have ever read. I already read 10 years when I loved you the most and December rain. I wanna cryヾ(☆▽☆)