Some people are super sensitive to alcohol. I'm that way....I'd feel even half a bottle of wine the next day, and any more than that and I would be hungover. But because I never drank in huge amounts and could always stop, I wasted a lot of years because I could tell myself I didn't fit the "problem" definition.
But alcohol made me depressed, cranky, and negative. That's a problem!
Try putting it down. You'll be amazed at the difference.