Three Words you could never say

I love you because..
You are always there for me
And we never fight or disagree
You can make me calm down when I am mad
And you hold me close when i am sad

So can you tell me why
Am I really falling for another guy?
Why am I breaking my every promise to you
Please tell me that this can't be true

But It's not like he's better
Last but not least
He isn't afraid to say that he loves me
And because those three little words you could never say
You left me no choice but to walk away
Away to the other guy
Well at least now I know why