You're just a lost boy, with your head up in the clouds
You're just a lost boy, never keep your feet on the ground

Always gonna fly away, just because you know you can
You're never gonna learn there's no such place as a Neverland
You don't understand
You'll never grow up
You're never gonna be a man
Peter Pan

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You were supposed to be his forever the one that stood by him no matter the challenge but now things have changed he can't be a man because of his fears of loving and the potential of growing up because he starts to love.