tell me why

we've been together for years, you for me and me for you, my dear, it seems you're changing your song, your tune is flat and all the words are wrong, please tell me why, you never acted like this, you never messed with my confidence, who am i with, i can't tell, our life was good but now its something else, so tell me why, why do you hurt me the way that you do, that's not fair, i wouldn't do it to you, our bed's so cold and smothered in lies, oh why?!