 If you liked
Banana Fish
|
 ...then you might like
Mo Dao Zu Shi
|
plot driven, heart wrenching, very well written BL shows with great characters.
The protagonists in both are similar in some ways. For instance, both Ash Lynx and Wei Ying lost the people closest to them before their very own eyes and suffered through a lot throughout the show.
In both animes (or donghua fo Mo Dao Zu Shi if you prefer) it is hinted to have BL between the two main casts.
Both shows are absolutely heart-wrenching. I think you might get a similar vibe to Mo Dao Zu Shi from Banana FIsh.