Lyric discussion by EightThirty 

I interpret it as a relationship between her body and her soul. It sounds like she wants to leave her flesh/reality because life seems to be cruel and trivial at times and she wants to experience the absolute peace, carelessness and spiritual experience of being away from her body and life in general.

She wants to not care, she wants to lose her mind (turn off her thoughts), leave her heart (stop feeling emotions) and she doesn't need what the World has to offer her. She wants to feel nothing.

Her body is the human part of her, not her soul. Perhaps she is just done with the human part of her and wants to be free from sorrows of the past and anxieties of the future.

Just my interpretation, but I think anyone could cast their own opinion on it and it may work.

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