Lyrics:

[Verse 1]
There's a thin, thin line between love and hate
Between a heart that's whole and a heart that breaks
Between ending the world or saving the day
There's a thin, thin line between love and hate

[Chorus]
We used to be so happy, didn't we?
We used to say that forever'd be easy
But the day that you lied, I felt it all change
I crossed that thin, thin line between love and hate

[Verse 2]
Now there's a thin, thin line between you and me
Between what this is now and what we used to be
The one that you choose to the one that you cheat
Now there's a thin, thin line between you and me

[Chorus]
We used to be so happy, didn't we? (We used to be happy)
We used to say that forever'd be easy (Forever'd be easy)

But the day that you lied, I felt it all change (Oh)
I crossed that thin, thin line between love and hate

[Bridge]
Ooh
Ooh, ooh, ooh, ooh
Ooh, ooh (We used to be happy)

[Pre-Chorus]
Now there's a thin, thin line between love and hate
Between a heart that's whole and a heart that breaks

[Chorus]
We used to be so happy, didn't we? (We used to be happy)
We used to say that forever'd be easy (Forever'd be easy)
But the day that you lied, I felt it all change (Oh)
I crossed that thin, thin line between love and hate

[Outro]
Ooh (We used to be happy)
Ooh, ooh, ooh, ooh (Forever'd be easy)
Ooh, ooh (We used to be happy)
Ooh, ooh, ooh