How do you know if your an alcoholic?

Involved answer: Visit a qualified counselor/health care professional for a screening or assessment interview. Answer questions honestly, don't pull punches. You will get an honest evaluation.

Simple answer: Think of the acronym WART "With alcohol repeated troubles". If you had a problem (money, job, relationships, health, etc.) one time when you drank, but never since, it was probably just an event - maybe you even learned from it and changed your behavior. If you drink and continue to experience problems that could be related to that drinking (including missing work because of hangovers, delaying paying bills while still buying your liquor or beer, and so forth) you are likely an alcoholic.