Most Helpful Guy
Most Helpful Girl
Could be what you ate earlier or while drinking. Digesting food, especially bread, breaks down alcohol quicker.
You also might not have realized you were drunk because you weren't "drunk drunk". Usually I don't realize I'm even drunk until I'm either stumbling or slurring words.
Also your friend, theoretically, much more than you. Shots of hard liquor usually run between 60 and 80+ proof (whereas the wine you described is only 26 proof).
From my own experience, combine a shot or 2 of Bacardi 151 or Everclear with an empty stomach and there won't be any question of "am I drunk?"