She's been by your side
She's loved you all this time
But I've seen you with other girls behind her back

Your relationship had colour; now it's black
Oblivious you're showing the cracks
That everyone can see

But it's not her, it's you
(She doesn't know...)
And it's not her, it's you
(She doesn't know...)

You're a liar
And she doesn't know it
You're a liar
And you don't show it
You're a liar
And she doesn't know it
You're a liar
And you don't show it

If only she knew
If only she knew
If only she knew
If only she knew

A lie leads to another lie
Another lie, leaves a pain inside
It's like you want her heart to die

We know she's been hurt in the past
Now all you're doing is opening up the scars
That you stitched together yourself

But it's not her, it's you
(She doesn't know...)
And it's not her, it's you
(She doesn't know...)

You're a liar
And she doesn't know it
You're a liar
And you don't show it
You're a liar
And she doesn't know it
You're a liar
And you don't show it

If only she knew
If only she knew
If only she knew
If only she knew

Woah (Ohhh!)
Woah (Ohhh!)
Woah (Ohhh!)

If only she knew
If only she knew
If only she knew
If only she knew
If only she knew what I knew
If only she knew what I knew
If only she knew what I knew
If only.........