As I said, if you can drink a whole bottle of wine and not feel drunk I'd be concerned.
It doesn't really matter what someone's 'opinion' of binge drinking is, You don't have to be falling over puking, it's a simple fact. "The NHS definition of binge drinking is drinking heavily in a short space of time to get drunk or feel the effects of alcohol.
The government advises that people should not regularly drink more than the daily unit guidelines of 2-3 units of alcohol for women (equivalent to a 175 ml glass of wine). ?Regularly? means drinking every day or most days of the week.
Binge drinking for women, it?s drinking more than 6 units of alcohol, equivalent to two large glasses of wine. "
That's from NHS. So NHS defines binge drinking as 2 glasses of wine. You say you have 4. I don't care how much you drink, I don't know you.
but seriously, those are the facts, and Yes, I think defensiveness is also a worrying sign.
As for drinking alone, I don't think that's a sign or not of a problem - people who live on their own for example, you can live with someone and the pair of you share a bottle of wine a night every night can think well, we're not drinking alone and sharing so we don't have a problem, while if they HAVE to drink every night they probably do. imo.