Yes, our body can repair everything except the brain and spinal cord cells. So you have all chances of improving but the only one who can help yourself is "YOU". We human beings can achieve everything if we are determined. Also you son is your best inspiration. Just don't think of drinking alcohol again. Divert your mind to planning some constructive activities that you are going to take-up next day or plan something to do for your son and family each day before you go to sleep. Yes, You can do it! By the way you can also vist my Make Money Online blog to learn and start a blog to make money online so that you can divert your mind and keep away from drinking - believe me this online world of money making is more addictive then alcohol.