Welcome to SR, Pearl
I'm 24 and I've been sober five months. I can understand why you're worried about quitting when so many of your friends drink and when drinking is such a large part of social life for young people. But just because it is considered acceptable, doesn't mean it is a good thing to do.
I didn't want to throw my life away either... I didn't want to spend my life drunk, hating myself, drinking too much even when I knew drinking wasn't a good idea. Being sober has totally turned my life around - I'm doing things I've always wanted to do and I'm having more fun than ever.
You can be sober, Pearl. Never forget that
Wishing you all the best x