Been there, done that, didn’t get the t-shirt.

Lack of self confidence feeds depression and depression feeds lack of self confidence. An important thing to regaining self-confidence is baby steps. I noticed things you had confidence doing; tieing my shoes, taking and shower, get dressed. From there, I could notice confence in tasks like cooking eggs, driving a car, fixing stuff around the house. As I noticed the confidence with the little stuff, it opened me up to notice more confidence in more difficult tasks.

Another important thing was not to deny when someone shows confidence in me. A better answer is a gracious acceptance and not denial. I went from, "You don’t mean that," or "I don’t believe that," to, "Thank you," or "I'm glad you noticed that. It means a lot to me." In other words, I accepted someone else's confidence in me to build my own self confidence.