I think the girl cheated on the guy, and he wants her to forget about what he told her, like that he loved her. He's pissed. He say's "You were selfish too, but you were never all alone" implying that while he was alone, she was with someone else. He also suggests that she has a selective memory, only remembering negative things about him and using them as excuses for what she did. "Now I know how you remember, and those moments that you choose, will define me as a traitor, stealing everything ya lose."
I think the girl cheated on the guy, and he wants her to forget about what he told her, like that he loved her. He's pissed. He say's "You were selfish too, but you were never all alone" implying that while he was alone, she was with someone else. He also suggests that she has a selective memory, only remembering negative things about him and using them as excuses for what she did. "Now I know how you remember, and those moments that you choose, will define me as a traitor, stealing everything ya lose."