Can’t cope unless I’m drinking

So yeah. I have social anxiety, and I’m only comfortable in certain social settings if I’m drinking. I also recently dealt with a trauma in my family, we’re all stressed and drinking helps take the edge off. I’ve been drinking a lot, sometimes I can control it but more recently I find myself drinking at a much higher amount and making ‘excuses’ to drink a lot. I don’t want this to become a problem, any tips on how I can cut back and cope with stress? I’m scared because this is the first time that I’ve been able to actually cope with certain social events and I find myself drinking like half a bottle of wine beforehand just to be at an ok level of social functioning.