我是个只爱你的疯子你是个只爱我的傻子
[wŏ shì gè zhĭ ài nĭ de fēng zi nĭ shì gè zhĭ ài wŏ de shă zi]
The phrase means 'I am a crazy person who loves only you; you are a silly one who loves only me.' This is often used between young lovers or friends in deep love, emphasizing their mutual infatuation and uniqueness in the eyes of each other, a kind of exclusivity and dedication.