I'm losing myself

I'm a fast breather, I'm a hairless dog.
And alone at the end of the day, I'm just like the gathering fog.
I'm a slow mover, I'm the best laid plans.
And alone at the end of the day, I just sit with my head in my hands.

But we speak easy. And we seldom fight.
And I chew on the bones of the day while you sleep soft and warm in the night.
And i can't see you, with anyone else.
Even if that means holding me down, even if that means losing myself.

He's a smooth talker. And he shaves his face.
And i wonder if you look at me and instead see him taking my place.
But i do need you, and no one else.
And i hope you're around and forgiving when you see me losing myself.