花落心已凉
[huā luò xīn yĭ liáng]
'When flowers fall, the heart has already turned cold.' This idiom suggests an inner emotional world closely tied to the natural scenery, particularly flowers, where petals falling symbolize loss and despair in one's feelings, especially referring to romantic disappointments or unfulfilled hopes. It is commonly used by people to indicate the end of a relationship or the cooling down from a once intense emotion.