Lyric discussion by adamdqui 

This is a break up song. The character Lucy is a name given to her heart/emotional afflictions prevalent during the relationship. Lucy has given herself completely to her partner, but, inferred, her partner hasn't reciprocated. In other words, she (the singer) has given her hearts complete love (Lucy), but her love hasn't. When Lucy goes underground, this is saying her heart is broken. The first verse is questioning weather she is distraught by it, and the second is confirming and also wishing to be let go of the pain. Her afflictions will cease given the expression of love ("you've got your hand on the button now") from the chorus. Finally at the end she can't take it anymore (I'd rather die).

Hit the nail on the head with that one

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