You’ve had a long time to tidy up that messy situation, and you still haven’t finished the job! True, it’s no fun to apologize and admit you were wrong, but until you do you won’t be able to put this thing behind you. Just tackle it head-on. Start that conversation that you’ve been dreading. Put your cards on the table and encourage everyone else involved to do the same. Things will be so much more fun once everyone knows where they stand again.