Should've known by the way you pass 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 You took the lonely and took me for a ride And I wanna un un un un 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 un un un un undo it Na na na na na Na na na na na Na 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 gonna be the same Oh no you'll never change You stole my happy You made me cry You took the lonely and took me for a ride And I wanna un un un un 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 un un un un undo it Na na na na na Na na na na na Na na na na na na You want my future you can't have it Still trying to erase you from my past I need you gone so fast You stole my happy You made me cry You took the lonely and took me for a ride And I wanna un un un un 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 un un un un undo it You stole my happy You made me cry You took the lonely and took me for a ride Boy you blew it You put me through it I wanna un un un un undo it