An update:
First off, thanks to those who responded and emailed me, particularly Amy and Gabrielle. It was a great help.
Being somewhat tenacious, I decided to confront the mirror in class, so have started practicing close to the front and make sure I have a good view of myself in the mirror. I still don’t much like what I see, but I am getting used to it, and maybe judging myself a little less.
My practice is improving by baby steps but it is improving.
Perhaps most significant is that I have tentatively begun a new relationship with someone far more positive about me than I am. I can’t help feeling that this is a direct result of my attempts to confront myself in the mirror.
Again, thanks to all.
Dave