I think NoCake is saying the essence of what I want to say, but perhaps a bit more assertive than I would say it

I understand you've cancelled dates and perhaps left him feeling neglected because you couldn't bring yourself to go out. In that situation, if you were my girl, I'd pop round with supplies and cook for you. You would need to make too much of an effort, just sit there in your jimjams. Even if it was just an M&S meal for 2 thing. Maybe it's that sort of thing you say you've cancelled? If it is, sorry for misunderstanding.

I have helped a very good friend through depression and she was in a similar place to you at one time. It takes patience, care and support. You can and will come through this. Try to be positive and take the pluses out of the small steps you make.