I drink once a week with friends, sharing a bottle of wine. Am I okay?

Probably unless? Believe it or not problems with alcohol are not always defined by amount drank, but instead by what happens to you when you do drink. Do you engage in risky behavior, does it create conflict with others? I'm streching of course because i would suspect this would only be about 2 drinks max, right? Doing that once a week is likely ok for people with out drinking problems, or serious medical issues.
Alcohol. If you are sharing a bottle of wine with 2 or more friends once a week you are ok. If you are concernend going forward write again. Eating while drinking will help limit the effect at the time and thereafter. Best wishes.