Why don't this person fall asleep?

"I don't wanna close my eyes
I don't wanna fall asleep,
{                                    }, baby
And I don't wanna miss a thing "

This phrase is a past of the song, "I Don't Want To Miss a Thing,"
the theme song of a movie of Armageddon.
Think why this person don't close his eyes and fall asleep, fill in a blank.

Aerosmith - I Don't Wanna Miss A Thing (Armageddon)
http://www.youtube.com/watch?v=rKAn1HvmRXM

My intoroduction

My name is Shota Matsumura. I'm 21 years old. I'm from Ozu in Kumamoto.
I like movies. My favorite movies are"Armageddon" and "The Shawshank Redemotion."
I like sports, too. I play volleyball. My favorite player is "Giba." He is Brazilian player and one of the best volleyball players in the world. His performance makes me excited.

I also like music. My favorite musician is "Back Street Boys." I like the music, "I want it that way."

www.youtube.com/watch?v=4fndeDfaWCg