谁的新欢不是他的旧爱
[shéi de xīn huān bù shì tā de jiù ài]
'Shui De Xin Huan Bu Shi Ta De Jiu Ai', meaning that 'any new lover isn't really new because he/she used to be an old love'. The user seems cynical or bitter toward love, which is often due to personal unhappy experiences with relationships.