Why is it that when I’m drinking, I feel clear, maybe a slight buzz, when I am clearly drunk?

See when I was younger alcohol was always so much fun. These days when I drink, I always feel like I need more to get to that energetic point.

Also, when I try to drink more in an attempt to get to that fun/energetic stage, I skip past that entirely and just feel heavy and drained. Once that happens I’ll be asleep in 20 minutes, tops.