[Verse 1]
I noticed today
You're looking great
Wearing a big smile
On your face
A new pair of shoes
Well, isn't that cute?
I wonder where you're
Running off to
It's not the first time
You've left me behind
Coming home in the middle
Of the night
You climb into bed
What's on your breath?
You say it's just a night out
With your friends
But I'm not stupid

[Chorus]
You never hid it well
I could always tell
You never thought I knew
But I was on to you

[Verse 2]
I should've known
You weren't alone
I heard his voice
On your telephone
Called you at home
Could tell by your tone
Plus I heard his voice
On your telephone
And I'm not stupid
[Chorus]
You never hid it well
I could always tell
You never thought I knew
But I was on to you

[Refrain]
You made me look like a fool
But really, I'm cooler than that
Dude you're doing
You never thought I knew
But I was on to you
I was on to you
But I was on to you

[Bridge]
White little lies
And all the pain
And all of these clues
Will finally explain
What you've done
Is out in the open now
And I just wanna say
That I'm not stupid

[Chorus]
You never hid it well
I could always tell
You never thought I knew
But I was on to you
[Refrain]
You made me look like a fool
But really, I'm cooler than that
Dude you're doing
You never thought I knew
But I was on to you