May God bless you as you apply these thoughts to yourself and your question. It is a form of sin. Alcoholism is a sin. Scripture teaches that it is not wrong to use alcohol in moderation. Paul seemed to be recommending this for medicinal reasons.
Alcoholism is also a disease.
Like other drugs, it can be addictive. In such a case a person's body develops a chemical dependency to alcohol. Alcoholism also leads to other diseases such a liver failure. When treating someone with alcoholism it is important to remember these two points. Otherwise one will not be treating the entire problem of alcoholism.