Boy I could really relate to this one m. I had my own business too until my last bout with depression. I was a single mom of two, and working two jobs. One was the one I created (contract work with the county), and the other was a paid position (directing elder outreach programs). Both were high stress jobs, but I also loved them both.
Then a bad bout of depression hit and my work began to suffer at both jobs. I started missing a lot of work, and when I was there, the quality of my work had really declined.... my clients could see it too. It was a huge dilema because I knew I was overloaded and my self-care was out the window.... but I really didn't want to let any of it go.
It's funny how our bodies make decisions for us that we don't necessarily agree with.
After working a bit with a wonderful therapist, I decided for my sake (and my children's), that I had to let one of the jobs go. I had a very understanding supervisor at my paid job who offered to up my hours so that I could continue to support my family. I for sure had a grieving period after letting my business go, but I was able to climb out of the depression eventually.
I don't know what the right answer will be for you. I do want you to know that I feel for you. Making these kinds of decisions are not only difficult, but usually involve a big life-change which can be terrifying. So not only are you dealing with depression, but this as well. It's not easy. I hope you have supportive people around you who can help you process this.
Deb