Not exactly what you've asked for, but in these dramas the leads became close and each fell in love (but didn't necessarily date) before they were forced by circumstance to separate (not a situation where one or both of them decide to break-up). When they meet again, the ML either still has feelings for the FL or falls for her all over again:
Not exactly what you've asked for, but in these dramas the leads became close and each fell in love (but didn't necessarily date) before they were forced by circumstance to separate (not a situation where one or both of them decide to break-up). When they meet again, the ML either still has feelings for the FL or falls for her all over again: