I honestly believe that the whole song was about a couple promising to be together until the end and in the end someone (the girl in this case) backs out leaving the other partner feeling lost and confused without her by his/her side. I assume it's a girl because of the Mona Lisa reference. Mona Lisa is an unknown female who is believed to be the wife of Florentine merchant Francesco del Giocondo. Nobody is really certain of her and her date though. Bringing me to believe that his "wife" reminds him Mona Lisa because her love is unknown to him. He feels it towards her but he knows that she doesn't love him the same. The awkward stranger part refers to if she is not his loving wife then he doesn't know this mysterious women who is crying anymore. His love with seemed to be a lie. In the end, he would rather his "wife" be dead than not loving him. The whole "a diamond gold ring" part really backs up that his love for was filled with good intentions until her prevalent un-interest in him settled in. All she has ever had towards him was lust and that was what killed him the most. In the end, she's dead and a mystery still, but he realizes the only thing that seemed to stay the same about her was the sound of voice. Now re-read the entire song. I feel like this plot makes the whole song come together in my head. This is only my opinion and I don't know if it's true or not, but if it was I praise Vic for hiding these meanings so carefully. Thank you for reading!