我爱你人尽皆知只你不知
[wŏ ài nĭ rén jĭn jiē zhī zhĭ nĭ bù zhī]
Wo'ai nin jin jin jie zhi zhi ni bu zhi translates to 'Everyone knows I love you, only you don't'. It's a somewhat humorous way to express unrequited or misunderstood love that has become publicly recognized but overlooked by the object of affection.