难以言表不言而喻的我爱你显而易见心照不宣的我爱你
[nán yĭ yán biăo bù yán ér yù de wŏ ài nĭ xiăn ér yì jiàn xīn zhào bù xuān de wŏ ài nĭ]
This elaborate phrase translates as 'A Love That Cannot Be Put Into Words But Is Clearly Mutual and Unquestionable.' It indicates a profound yet unspoken love, where mutual feelings are well understood despite not being openly expressed.