Alcohol drink periods

My mother thinks that’s I am drink a lot, but I don’t. She’s truly believes that I am like her relatives. But I am not like him. She’s always make a mess if I drink 0.3 liter of beer or smaller. Yes, maybe I can drink several days a week, but every time I don’t drink a lot. I am always in my mind and understand what happens. I pay my bills, I pay for all my family, but this doesn’t help. She’s still thinking that I am alcoholic, but I don’t. I never was. I don’t know what to do. I just drink to relieve my body and watch some movie or series with my girl or brother. But when she sees that I drink, just a little bit, it’s always a mess. I tried talk to her. Unfortunately it wasn’t successful.

What should I do? I want live by myself. I am really tired from all of this. I am not like other family. I care about my life due this I am not drink a lot. But I am really tide from all this arguing and mess.