Lyric discussion by deepwater03 

To me, this song is about a girl who's just focused on everything wrong with this world (the car crash, sea of troubles, see your sadness). She meets this boy who tells her to live her life not lingering on those things and "always move fast", as to not let her sadness linger and swallow everything. At first she listens for while "I might stay for a while". She tells him he's living a world he's dreaming about "you're not awake." "your mind made it real. She thinks he's not awake enough to see the world as it really is; full of a soulful sadness. She leaves repeating his words to him "always move fast" is saying not to waste his time thinking about her.

I think this interpretation makes the most sense.

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