Alcohol doesn’t affect me like it used to

Alcohol Doesn’t affect me like it used to,I am 21 now ! From ages 17-19 when I got drunk it used to make me very confident,Very happy,very hyper and just overall extremely euphoric I feel like I could talk to anyone and I did to girls and anyone,Now when I drink ever since age 20 even if I have 10 pints a beer I don’t get the same happy euphoric feeling I used to get,It doesn’t increase my confidence in any way anymore and it’s a completely different type of drunk than it used to be,Now when I get drunk I tend to sit back I’m more relaxed my confidence does not change infact I’m more down and depressed on myself even though I have not changed,I guess what I’m saying is when i used to drink age 17-19 I felt extremely euphoric like Everthing was amazing and I’d talk to anyone and I’d get extreme happiness,Now it feels just very messy and my confidence does not change. Why any reasons ?