There is no need to apologize.
I understand, having relapsed a few times myself after extended periods of sobriety. I was at a meeting tonight and someone with long term sobriety, admitted to a relapse recently. Alcohol is cunning, baffling, powerful, and also very patient. Sobriety is a "one day at a time" thing for me, I can't get complacent.
Glad you made it back.