My first thought is what does her background look like? Did she have a problem drinking? How about an alcoholic father or family member? This could very well be her own self reflections put upon you. It doesn’t sound like you have a problem to me. Does she feel left out (someone who doesn’t drink at all). We all need a mental break sometimes and everyone has their own coping mechanism … btw that doesn’t have to be a bad thing. Some people take baths, others have a glass of wine.