Should i email?

7-8 months ago I was volunteering at a brand new lottery funded youth centre. It cost millions. It was an incredible environment and somthing I enjoyed. The manager was also asking if I would be interested in a job.

Problem is, at the same time I was suffering from depression and social anxiety, my anxiety got to the point in which I couldn't face leaving the house let alone the bus or the crowded building itself. I never went back, I also didn't email the manager nor did he contact me.

I was and still am ashamed of my depression/social anxiety, I didn't tell anyone about it hence why I didn't email him. I feel the need to apologise, I was there for work experience as part of a course but got on so well with him and enjoyed the work so much that I carried on for a month after the course ended. It was a last min thing and he was doing me a favor, I owed him an explination.

that is my main incentive but a small part of me wonders if regaining contact could also lead to more volunteer work

But after this long I think it'd be weird to apologise now also I'm not at all comfortable mentioning depression and especially social anxiety to someone I don't know that well, due to anxiety I already assume people think i'm weird so i assume he'd read the email and laugh or just think i'm a freak

It was great experience and seemed like the start of my dream career. What should I do?