If you can stop and stay stopped for a few weekends in a row and it doesn't fester in your mind all week about not drinking, then you might just be a heavy drinker. A heavy drinker looks like an alcoholic at times, except that a heavy drinker can quit for good and all if given sufficient reason to (possible jail, loss of job, loss of significant other, etc). Alcoholics can't quit, regardless of the consequences.
You mentioned getting wasted for the sake of getting wasted on weekend, but fine on the week days. Perhaps changing it up on weekends - where you go, who you hang out with, might make a difference. If that's the case and you can keep going weeks without boozing hard, have the occasional wine or so, then you might not be one of us. Time will tell either way.