久居我心才是王久居我心才是妻
[jiŭ jū wŏ xīn cái shì wáng jiŭ jū wŏ xīn cái shì qī]
Only one that stays in my heart forever is the king, also queen (in the user's heart), indicating the special significance of this 'someone' in their mind over other temporary loves or relationships.