It's not a theory

Listen to Barrel Of A Gun by Guster, or just read these lyrics, and tell me what you think it's about... My theory is in the comments...

I know a movie star.
I've got her plastered to my wall.
Just like we're dear old friends
Like she already knows me.
She's as perfect as she seems,
Lifts me right out the mezzanine.
I finally fell in love.
I'd been waiting forever.

Four, three, two, one
When at the barrel of a gun
Keep my head way down.
Stay out, I'll stay in.
Half-dead, half numb
She's enough to make me warm.
It's all so safe and sound.

Lie back and fast asleep
If you could she what I could see.
Drip drop a lovely dream.

Goddamn you movie star.
Can't you just stay a minute more.
We'd be the best of friends.
You could stay here forever.

Four, three, two, one
When at the barrel of a gun
Keep my head way down.
Stay out, I'll stay in.
Half-dead, half numb
She's enough to make me warm.
It's all so safe and sound.

She will be sweet on me
Just like a mystery
It's all so hard to see
If I'm not mistaken
She comes from far away
And gets closer everyday
And all that I can say
She's all I want and all I'll ever live for

Four, three, two, one
When at the barrel of a gun
Keep my head way down.
Stay out, I'll stay in.
Half-dead, half numb
She's enough to make me warm.
It's all so safe and sound.