I don't really think the chorus is about someone leaving the girl - when she says, don't ever say you've tried to leave me in this life, I think it means, don't tell me you've tried to kill yourself. And the verses are her showing the boy how much they can do in life and to keep trying (which is why she says, don't ever say you've tried for the last time).
I don't really think the chorus is about someone leaving the girl - when she says, don't ever say you've tried to leave me in this life, I think it means, don't tell me you've tried to kill yourself. And the verses are her showing the boy how much they can do in life and to keep trying (which is why she says, don't ever say you've tried for the last time).
BUt that's just my interpretation!