Congratulations on feeling better.
I've also dealt with depression, although it sounds mild compared to what you've been through.
Shortly before I started parkour, I felt as though I'd lost touch with who I was. I was too busy being what everyone else wanted or needed me to be. I had this image of myself in my mind of who I was, of what I was all about, but I hadn't expressed it in years.
I got depressed and was crying all the time. I'd wake up sobbing, spend the day barely holding it together, crying at times, and collapse into tears at night. It was so frustrating because, even then, I was still having to live out all the roles that were expected of me instead of being myself.
Parkour is what changed it for me. I was chasing my kids around a park and just happened to see people practicing parkour. I'd been interested in it for years, but hadn't ever gotten the chance to train with others, and didn't even realize there were so many resources for it on the web, because when I first became interested, there wasn't. I literally told my husband, "Get the kids," walked up to the people and said, "I've never done parkour, but can I train with you?"
And that first day, those first few minutes, I felt like me again.
For me, the root of the depression was the disconnect between the person I felt I was and the life I lived. I addressed that, and the depression was gone.
What is the root of your depression? Can it be addressed?