深情少年薄情女深情少女凉心男
[shēn qíng shăo nián bó qíng nǚ shēn qíng shăo nǚ liáng xīn nán]
Combining 'passionate young man indifferent woman passionate young girl apathetic man,' this conveys complex emotions about unbalanced relationships: it expresses a situation where feelings are not reciprocated as expected.