Lyric discussion by fromadistantsun 

She's in love with him. He's in love with her... and another woman. He wants to be with both of them, but it hurts the singer too much when he goes off with "her," and she feels betrayed by his inability to commit. She knows that if she forces him to choose, he won't choose her... so she's walking away.

I don't think this is a typical "you cheated on me and I'm leaving you" song-- the situation seems far more complicated, either an open relationship or an affair (he's married and the singer is "the other woman"). It seems as if he really does love her deeply and will be heartbroken when she leaves, but he's unable or unwilling to give up the other woman he's with, and the situation just hurts her too much for her to stay. Painfully beautiful.

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