I should've known by the way you passed me by 
There was something in your eyes and it wasn't right 
I should've walked, but I never had the chance 
Everything got out of hand, and I let it slide 

Now I only have myself to blame 
For falling for your stupid games 
I wish my life could be the way 
It was before I saw your face 

You stole my happy, you made me cry 
Took the lonely, and took me for a ride 
And I wanna undo it 

You had my heart, now I want it back 
I'm starting to see everything you lack 
Boy you blew it, you put me through it 
I wanna undo it 

Na, na, na, na, na 

Now your photos don't have a picture frame 
And I never say your name, and I never will 
And all your things, well, I threw them in the trash 
And I'm not even sad 

Now you only have yourself to blame 
For playing all those stupid games 
You're always going to be the same 
Oh no, you'll never change 

You stole my happy, you made me cry 
Took the lonely, and took me for a ride 
And I wanna undo it 

You had my heart, now I want it back 
I'm starting to see everything you lack 
Boy you blew it, you put me through it 
I wanna undo it 

Na, na, na, na, na 

You want my future, you can't have it 
I'm still trying to erase you from my past 
I need you gone so fast 

You stole my happy, you made me cry 
Took the lonely, and took me for a ride 
And I wanna undo it 

You had my heart, now I want it back 
I'm starting to see everything you lack 
Boy you blew it, you put me through it 
I wanna undo it 

You stole my happy, you made me cry 
Took the lonely, and took me for a ride 
Boy you blew it, you put me through it 
I wanna undo it