I had depression. Life was miserable. For a decade.

Then, suddenly it wasn't. For 2 golden years. It felt like I'd healed. Like it was over. My depression was gone and my life was finally good. 

Then, covid happened. And it all went back to how it was. I lost the thing that had made my life so good that my depression didn't stand a chance. 

The fact that my depression is back, that my life is back to THIS, is making me more depressed. 

How do I break out of this thought loop?