Second Edit: Why I Don't Sleep Naked Anymore

[Todd]

Hi Richard, let me give you some feedback on this version.

Second Edit:

Why I Don't Sleep Naked Anymore--I like the title a lot. It raises a question for the reader. I wonder though if your first line is the right lead-in to answer the question posed by your title.

Winter nights crawl in, reaching for blankets.--There's nothing entirely wrong with this line. My possible issues with it are its placement as the first line (for the reasons mentioned). Also, you sort of want winter reaching for the blankets to portray the new coldness in the relationship. I think you need a setup line to have this one have the sort of resonance you're looking for. 

There are still times when snow melts,
weakening ice cracks silently, the sky dark--I think weakening can be cut. It doesn't do much for you here. The break on dark leading into the next line is exactly what I want.
like the nightdress you used to wear.
The one that hung tight against your hips, drooped--How about changing The one that to "That once"
in the front, felt soft against my belly.

Your snoring used to make me feel warm,--I'm thinking that this is the closest line you have that might be suitable as an opening. then followed by the Winter nights line. It would require a change to lead into this strophe.
but now it reminds me of old men, waiting
for their turn to die.--Better ending. You probably could cut "for"

Just some thoughts. I think you're moving in a good direction.

Best,

Todd