I'll spend the night living in denial
Making paper planes just for a while
I'll crash into you, crash into you
Did you crash in my imagination

from Green Day – Fell For You Lyrics on Rap Genius

Meaning

Billie Joe is saying he will believe his dream was true even though he knows its not. And that he wants to be with this girl and hes not sure if she likes him back or its his imagination.

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