SML is Fl's Childhood Friend?

SML is the FL's long time friend or friend from childhood who likes her.

• Bromance
• Thirty But Seventeen - There's more than one SML that likes the FL.
• My Secret Romance - SML has known the FL for a long time but I'm not sure if their friendship dates all the way back to childhood.
• Dream High - I don't remember the details of their relationship but he (Ok Taec Yeon's character) was something along the lines of a crush iirc.  
• A Love So Beautiful - The ML and SML were both childhood friends with the FL. 

SML is the FL's long time friend and there are no romantic feelings between them.

• The Beauty Inside

Dramas with one ML and two SMLs. One SML likes the FL, the other is the FL's long time friend and there are no romantic feelings between them. 

• Sassy Go Go - N / Cha Hak Yeon's character
• Cheese in the Trap - Nam Joo Hyuk's character

Similar to childhood crush.

• The Romance of Tiger and Rose

• My Love from the Star
• Strong Woman Do Bong Soon
• Midsummer Is Full of Love
• Moonshine and Valentine
• Professional Single
• Put Your Head on My Shoulder
• Summer's Desire
• The Eternal Love
• The Love Equations
• Please Feel at Ease Mr. Ling
• Itazura na Kiss: Love in Tokyo and its remakes