我拿他当命他拿我当深井冰
[wŏ ná tā dāng mìng tā ná wŏ dāng shēn jĭng bīng]
'I value him as my life while he regards me as deep well water—cold and distant.' It highlights an uneven relationship where one party feels deeply for the other, whereas the feelings aren't reciprocated, showing disappointment or sadness in a love context.