http://www.mangago.zone/read-manga/life_senjou_no_bokura/
this is the one that popped right into my mind
I usually avoid tragedies but these are among the few i read
http://www.mangago.zone/read-manga/sakura_gari/
http://www.mangago.zone/read-manga/back_in_time_to_you/
http://www.mangago.zone/read-manga/hana_to_ryuu/
http://www.mangago.zone/read-manga/hybrid_child/
http://www.mangago.zone/read-manga/paradise_view/
The forbidden, this'll make you cry every time you think about it.
http://www.mangago.zone/read-manga/10_years_where_i_loved_you_the_most/
I just remembered these two
http://www.mangago.zone/read-manga/yume_yume_shinjuu/ (if you dont get it read yuna takahashi's comment)
http://www.mangago.zone/read-manga/getsuei/ ch1 and 5, they're the same story
I'm in the mood to cry right now and would love to read some tear-jerking BL manga (whether it's from happy or sad tears!) and I cry pretty easily so pleaaase send in any BL that made you cry. Thank you!