错把谎言当承诺
[cuò bă huăng yán dāng chéng nuò]
Mistaken Lies As Promises indicates a sense of betrayal or deception in relationships, either intentional or unintentional; promises made were essentially false, yet the other party believed those sweet nothings as if they're sincere. In short, it's sad that one cannot distinguish truth from lies in matters concerning love.