Drinking isn’t the same anymore

Drinking and being under the influence just doesn’t feel the same anymore. When I was 14-17 drinking felt ethereal, I would have 3-5 drinks feel a fantastic buzz and was always up for more. I would be down for anything. I would get crazy, do stupid shit my friends would bring up a day later and go “dude I can’t believe you did that.” I would get so much confidence and become extremely sociable. I’d talk to every human in sight and it felt like I could never get enough. Now I’m in my early 20s after being sober for a few years and after one drink I just feel tired, I am fully conscious of my actions and I act the same as I would when I’m sober. My friends would want to do something and I just want to lay down and rest. I get tired and the sight of alcohol makes me sick. When I do force myself to drink more thinking I would get the same feeling, my body rejects it and I just ending up vomitting. Why can’t I have fun anymore. Is it a stronger tolerance? Is this normal? I don’t even want to drink anymore.