爱你的人让你没心没肺笑你爱的人让你撕心裂肺哭
[ài nĭ de rén ràng nĭ méi xīn méi fèi xiào nĭ ài de rén ràng nĭ sī xīn liè fèi kū]
'The person who loves you makes you laugh without care; the one you love makes your heart break into pieces' contrasts between joyful feelings from being liked versus pained emotions when liking someone else unrequited.