Looking for dramas where FL’s Unrequited love is NOT requited

Hello! Im looking for k-dramas or movies that has the theme of unrequited love that does NOT get requited (even at the end) With a Female lead and where she has the unrequited love towards a guy.

Preferably one where the FL doesn’t end up with another guy either. and it explores the acceptance of heartbreak .

 Im looking for some good pain, something that’ll have you continuously reaching for tissues to wipe your tears