We have all done things we cringe to think about. Everybody does it. I’ve made many embarrassing blunders. When/if you run into this guy, just pretend it never happened. You don’t even need to talk to the guy if you don’t want to. Plenty of time has gone by that the whole ordeal is not even relevant anymore. Once you move on, other people will too. Sure they may briefly wonder or think about something at first but when you’ve moved on they will do the same.