Responses
Ashita Shinu
Zetsuai + Bronze
Sakura Gari
Boys Next Door (if you're okay with more twisted themes)
10 years where I loved you most: http://www.mangago.zone/read-manga/10_years_where_i_loved_you_the_most/
followed
Not bl but To you the immortal will have you bawling. I guarantee
Really really sad heartbreak stories, bl or not just something to make me cry