住我心里要交房租
[zhù wŏ xīn lĭ yào jiāo fáng zū]
'Rent-Free Space In My Heart' metaphorically suggests that someone occupying one’s thoughts (often romantically) would need to 'pay rent'. It implies that it costs for others who want to reside in the user's heart or emotions. This can either be sarcastic if the user is fed up with another person bothering them emotionally or literal if they have genuine strong feelings towards that person.