Hi Annie,
I would Drop the Rope. You’ve done it with not contacting him. But when you see him at work, this is how you Drop the Rope: When he says “Hi”, you say “Hi”. You don’t say “Hi” first. Let him take the lead, like in a dance. He doesn’t exist unless and until he talks to YOU! Then, FOLLOW his lead.
At the same time, imagine that you are a Princess. A rare jewel. A five-star card. It’s as if he tried to throw junk away from his attic but Surprise! It’s worth a million dollars! Reframe The Story to be he didn’t know who you were, and he now has to live with that regret.
Be polite when you see him. But remember, you are an elegant lady with escorts, balls to attend, and a kingdom to run.
Good Luck!
Inky