Is there ever a social drinking point where someone can be addicted?

My gf has a couple shots every night of tequila or cocktails every date. If we are at a party she will take it farther till she is tipsy or on rare occasions incapacitated. She grew up where alcohol was normalized in her family so she has been drinking since she was 13, it makes me a little uncomfortable that she uses tequila to unwind in the evenings.

Am I being irrational, is a couple shots a lot or a little, typically I don’t notice the effects of her drinking unless it’s a social event like a function or party where she indulges herself a bit more.