First Edit: Drift

[UselessBlueprint]

Drift

I use a metal shovel
because last week snow fell,
whimsically guided by the breeze,
but now, it is frozen on the ground.        // fully good first verse

Inside, our son plays
with his imaginary friend
(we can't agree          // a well placed line-break.
on how much to humour him).
You protect yourself beneath a quilt        // "protect" gives a good set of potential meanings to this line
with a thread count you insisted on.

Your silent goodbye repeats in my head,        // This is where I'd prefer a more concrete image - a silent goodbye that repeats sounds like a waving hand, but I'm left unsure
while winter wind reminds me 
what must be done.

Very good sound to this poem. As billy said, it hints at some sadness - even darkness to me. I struggle with the final verse, as a silent goodbye means very little to me. I can't wrap around one single image. I can't settle on a waving hand, a mouthed 'goodbye', or just a look in their eyes. A few words might help to add some clarity there. Otherwise, very well executed, especially regarding word choice and line-breaks.