A plot element similar to one brought up in Marriage, Not Dating.

Towards the end of Marriage, Not Dating: It's brought up that even though the female lead is in love with the male lead now, she can't let go of the second male lead who likes her and that at one point she liked. Even though she claims not to like the other guy anymore, you can tell she does deep down and that causes problems for her relationships.

Are there any stories where that's a major plot point? 

 AH:

Sound of the Desert

Seen it, but thanks.