Am I considered a heavy drinker?

Hi all. So I am 18 and my parents buy drinks occasionally and don’t mind if I have a few. For the past week or so, I have about 3-4 bottles of alcohol at night time and it’s become a routine. My BAC is frequently around 0.1-0.18 (calculated on an online BAC calculator—I know they’re not entirely accurate but I pretty much get slightly shitfaced every single night). I’m a bit worried that I’m becoming an alcoholic because every time i drink alcohol, I am always thinking to myself, “I want to feel like this all the time”. And I would gladly drink during the day if I didn’t have a full time job.

This might be a dumb ass question but I just want someone’s input lol.