久居我心你却从不交房租
[jiŭ jū wŏ xīn nĭ què cóng bù jiāo fáng zū]
Translates literally to 'You have been living in my heart for a long time, but you've never paid rent.' It poetically expresses deep, possibly unreciprocated feelings toward someone; metaphorically, this person occupies the user's thoughts without giving anything in return.