落花或许有意流水未必无情
[luò huā huò xŭ yŏu yì liú shuĭ wèi bì wú qíng]
It implies that 'Falling petals might yearn for affection, yet flowing water may not be indifferent.' It conveys an idea of how one party could have feelings toward the other but fails to evoke similar sentiments in return.