There is a world of difference between a problem drinker and an actual alcoholic. Here's a simplified distinction. A problem drinker if given a sufficient reason to stop, can and will stop. An Alcoholic on the other hand will keep drinking despite the consequences, they have lost the power of choice when it comes to drink.
You may find it helpful to get a copy of The Big Book of Alcoholics Anonymous. Read The 1st portion of the book, it is dedicated to helping you find out your truth about alcohol.
All alcoholics have a common physical trait that makes them a distinct entity. It is called the phenomena of craving. When we drink, a craving for more develops. What's your experience with this, can you take a drink and then stop, or once the alcohol enters your bloodstream do you immediately want more. It's good you are asking these question, feel free to PM me if I can be of help.