Lots of people seem to think you can't be an alcoholic if you can hold down a job and function on day-to-day basis, or if you skip the odd day, or do dry January.
My granddad was a well-regarded university professor in his field. He lived into his nineties and was publishing papers just months before he died. He beat cancer twice. He lived to see his great-grandchildren. He was also an alcoholic and behind the façade, he had a lot of problems. You wouldn't know it to look at him, though.
An acquaintance of mine was more your typical alcoholic. She would binge regularly, mess herself, vomit all over the place and ended up in hospital multiple times before dying of organ failure in her fifties. When I first met her, I thought she was 80+. Alcohol destroyed her.
Two very different people, two very different lives - but both alcoholics with a lot of problems, both in terms of their health and relationships.
If you're having to ask whether you're drinking too much, you probably are.