Simpleman:
There are really two issues. One of them is medical. If you are an alcoholic (a better term than a "drunk") then, if you drink, the illness is likely to become worse as you grow older. If so, the time will probably come when you can't conceal it, when you lose your job, possibly your family. Sounds like the best way to deal with that is find a doctor who can be trusted to preserve all confidences and who can help you medically without getting you dependent on habit forming drugs. Also keep logging here on SR. The second thing is what to tell people when it's obvious you're not drinking. If they are nosey you can say that drinking interferes with medication you're taking, like for your blood pressure. If you've not got high blood pressure it's none of their business to know that. All you need say is that you take medicine which is not effective if you drink. Good luck.
W.