This is a bit of a re tread of another thread NC?
Is it the same people - the ones you feared would be there at something in February but weren't?
Be proud of what you've accomplished. You can't change the past but you have changed yourself - enormously.
If the subject comes up - I think it's unlikely, just apologise, and move on. That was then - this is now.
The idea that you might drink over this is ludicrous.
You have a strong recovery but most people won't even remember events of a year ago , especially if they drink hard themselves.
You are who you define yourself as, not what other people think of you
Even if drinking worked with stuff like this - which it doesn't - it's absolutely not worthy of drinking over.
D