You don't know

You don't know but I saw you talking with her
Close enough to make me believe that we are over

You don't know but I saw your face when you saw her
Long enough to make me believe I'm replaceable

You don't know but I saw you hitting on her
Hard enough to break my heart into pieces

You don't know but I saw you both kissin under the mistletoe
Now all I remember is that moment and your broken promises

You don't know that I know you lie to me every single day
Kissin me after kissin her with the same lips

Don't you know I can feel the difference??
Yet I smile cause I'm gonna pretend we are fine