Open Question: Did I just torture my liver?!?!?!?

I just had a 750 ml of yellow tail cabernet sauvignon and am not drunk. How long do I have to wait to start drinking again and did I just hurt my liver from drinking this much? (I know wine alcohol content so I doubt it) but how can I be sure that my liver is not suffering? I do this every weekend (I have a 750 ml bottle of wine friday, saturday and sunday) am I killing my liver?