Is it the depression or the medications (or both) making him sleep all day? I know with my own I just want to sleep all day, yet insomnia and work all day instead.
I'm guessing there's a long history of talking and/or trying to understand things as husband and wife. How is the communication now? Is there a way he might understand how all is affecting you, or for him to share with you how he might be able to feel a little better or to be up and about in or out of the house?
I don't have a partner that understands my mental health, but it is something that I desperately crave at times. It creates a distance between us at times, along with her releasing all at the kids, a circle that continues with stubbornness. Point is, does he have the right support to help him, or more stresses about all that might seem unrelated?
We're all different, but my thought would be to ensure he knows you are there for him, even if he might not want company so much. Ensure he knows, but without pressures to change in a moment, it's never simple.