First Edit: Drift

[Todd]

Richard,

I haven't read or commented on poetry for awhile so please excuse the rust.

Drift --I like the title for its versatility. It works with both a snow drift and the emotional act of drifting apart. It's a nice subtle hint at the content.

I use a metal shovel-Not a fan of this opening line. Use is a bit flat of a verb. Starting with a shovel implying that you may be burying things or attempting to dig them up metaphorically isn't bad. The line though carries little intrigue which I think is needed in an opener.
because last week snow fell, When you consider where the poem ends "last week snow fell" could imply an argument and a chilling in the relationship. It might be a better opening with a slight restructuring.
whimsically guided by the breeze,--Whimsically is too telling of a word for me. It would probably work better if you used some imagery to show the movement.
but now, it is frozen on the ground.--again I like ending this with frozen on the ground but I'm not a fan of the "it is" being sort of construct. I think your an edit away from making this pop off the page--but this is all to static for me presently.

Inside, our son plays
with his imaginary friend--love this part. Inside gives a slide separation and distance.
(we can't agree --great break (you could even emphasize it more if you wish though not entirely necessary (we can never agree)
on how much to humour him).
You protect yourself beneath a quilt--consider breaking on yourself. I like that the quilt mirrors the snow above and also implies a lack of warmth and connection
with a thread count you insisted on.--Nice character detail.

Your silent goodbye repeats in my head,--again not bad but still mostly a statement. Is there a way to express this with more imagery that plays off the theme.
while winter wind reminds me--again possibly find a way to clutch the shovel bring symmetry. Imply the chipping away or the burying.
what must be done.--Not a bad payoff line but to work it needs a better emotional build up.

I can see where this might go. I think it has good bones.

Best,

Todd