i cannot define if you are an alcoholic, only you can. but here's a saying that can help one who questions if they are an alcoholic in most cases where there are concerns-if you drink to get rid of a feeling, like your dbt session, or drink to gain a feeling one has a problem. example-depression, anger, etc. when a person drinks to numb their feelings they're using alcohol to escape.
another helpful tool-give up alcohol for 30 days. see if you can do this without drinking or having urges. this is not foolproof but does help you see what's going on.
there's another term re alcoholism,,,binge drinking. not like college students but having periods where one doesn't drink at all then when one drinks they consume large quantities. but how much one drinks is not a definitive comparison. it's why one drinks and what happens when one drinks that defines it. binge drinkers do more damage to their livers than everyday drinkers but in all the liver profile is an indicator of the liver being on overload no matter how we abuse alcohol. it can be a serious medical condition. usually abstaining from alcohol fixes the problem but only if one completely stops. http://www.alcoholism-and-drug-addic...l-symptom.html
going to AA can also help you. you can just listen to others who've been where u are now. they have found the answer and are doing something to change.
i hope this helps answer some of your concerns. i'm 21 yrs. sober and my life in quality is wonderful. no longer do i put alcohol use as my priority or abuse alcohol. no longer do i put any value in drinking. once i stopped drinking i realized how much i relied on it.