It is the way that alcohol affects someone which makes them alcoholic. There are certainly high-functioning alkies who can drink every day and still make it to work, etc. And there are "occasional drinkers" who are alcoholics.
Autumn has already stated how embarrassing her h's behavior was at the neighbors house and how his mood changes when he drinks.
What bothers me is the way he treats her while under the influence; the mean jabs, baiting, spoiling for a fight, comments made to throw her off balance, and some gas lighting thrown in for good measure.
Then he is "sorry" after.
This is classic. I know it well. I lived with a high-functioning alkie for many years.
It is a progressive addiction that will only get worse.