想你的时候谁在你左右想我的时候谁对我温柔
[xiăng nĭ de shí hòu shéi zài nĭ zuŏ yòu xiăng wŏ de shí hòu shéi duì wŏ wēn róu]
It's about love and loneliness: 'Who is around you when I miss you; Who treats me kindly when you miss me.' It illustrates longing and desire for reciprocated affection.