The liver does indeed repair itself from damage from alcohol, unless you drink so much for so long that you get cirrosis of the liver. That is when the liver becomes so damaged that it turns into scar tissue, and cannot repair anymore. Usually, though, only chronic alcoholics get this... usually older, but sometimes very heavy problem drinkers in their 30s get it! The warning signs of this is your skin or the whites of your eyes turning yellow, and easy bruising that takes a while to heal. If you have those symptoms, hurry up and see a doctor!! Otherwise, though, even if you do drink a lot, the liver can repair itself if you either limit your binges to the weekends, and let the liver rest during the work week (this will likely help you at work, too!!), or if you actually stop drinking altogether for a month or two every year. The liver can completely recover from alcohol damage (if you don't have cirrosis) in 1 - 2 months. I know a man who drinks tons and just goes dry for a month every year, and he's fit as a fiddle, and he's in his 60s. Two months would be even better.
Of course, people, liver damage isn't the only bad thing that being a heavy drinker can do to you!! It can really mess you up and speed up the aging process in many different ways. It also increases your chances of some kinds of cancer. So best to try and slow down on the drinking. I think keeping it to weekends is the best solution, and makes it easier for those of us who like to get more than just a bit relaxed from drinking.