Am I in danger of spiraling (OPINIONS)

I AM NOT LOOKING FOR MEDICAL ADVICE, DO NOT REMOVE THIS POST PLEASE

So, I am a 19 year old student, and have always had a huge tolerance for alcohol. By this, I mean that the basic amount of drinks I drink when I go out has almost always fallen in the 15-25 range, and I almost never get a hangover.

Currently, I'm completely in control of my alcohol usage. When I go out, I know my limits and drink only while already having fun, never when sad. What I'm worried is that changing. My father and grandfather have both been alcoholics, so I know there is definitely a genetic susceptibility (although I've never suffered because of it, as my father had already recovered when I was born).

I just want opinions/experiences from people who might have similar experiences. Am I in a danger zone? Currently I go out maybe once every one or two weeks, so my average alcohol consumption would be probably 40-50 beers a month, distributed over 2-4 days.