ML is in Love with the FL for Years, but She Doesn't Know About His Feelings

Please recommend romance dramas where the ML is in love with the FL for years without the FL knowing about his feelings.

Dramas like:

• In Time With You
• The Best of You in My Mind
• Adult Trainee
• My Fated Boy
• I Hear Your Voice
• I Need Romance 3
• Romance Is a Bonus Book
• Something in the Rain
• Pinocchio
• Go Ho's Starry Night

I happened to watch Adult Trainee and The Best of You in My Mind back to back and realized how much I love this dynamic. Now I'm rewatching My Fated Boy. 

• Happiness
• Hello Again!
• Love is sweet
• What's wrong with secretary kim? - it could be counted ig.

Love is Science

I Need Romance (2021 Thai)

• When We Were Young (2018)
• Just an Encore
• True Beauty

• Soundtrack #1
• When the Weather Is Fine
• Kiss Sixth Sense
• Blue Birthday
• My First First Love/My First First Love 
• My ID Is Gangnam Beauty

• Reply 1997 if you’re looking for this trope at its most straightforward, but the case could be made for both Reply 1994 SML to FL, technically ML returns FL’s unrequited feelings without her or anyone else knowing it & Reply 1988 again, SML to FL and ML to FL too.
• Go Ahead
•  I Can Hear Your Voice (and most Lee Jongsuk dramas since he seems to do this trope a lot)
• All About Eve
• The Story of Minglan
• The King in Love both ML & SML love her, she only doesn’t know the feelings of the one she loves/ends up with

You can check out my list ^^: https://kisskh.at/list/1R8BGDJ3