What's the difference if you label yourself a 'problem drinker' or an 'alcoholic'??
The old saying, "a rose by any other name..." comes to mind
In your post you have stated that you in fact have had problems with alcohol in the past, and even now with what you feel is a new sense of perspective towards drinking, you still can't guarantee that you can control your drinking when you decide to socialize. Why flirt with danger? Realistically, you can't trust yourself 100% when it comes to drinking in moderation, can you??
Think about this for a minute: what is so important about drinking that you feel that you want to keep it as a part of your life? You have seen how it has robbed you of many things up to this point, and how much better you are without it... take your history & learn from it...NOW. Don't wait for the years to add up & then look back to see the damage your drinking did to your life.
You seem like a very analytical sort of person... the writing is on the wall my friend... read it... and heed its warning.
I don't mean to sound harsh, but from what I have read of your story you are already questioning the role alcohol plays in your life... I think you already know what you need to do... look deep inside, that's where you will find your answer... not in some book.
All my best to you