There's nothing wrong with pursuing a life of sobriety if that's your cup of tea. Some people prefer ditching liquor because they want to remain as conscious of their surroundings as they possibly can at all times. Others don't care to drink because they simply don't like the taste. For some, it's as serious as being part of a program like Alcoholics Anonymous.
Whatever reasons you have for being sober are totally valid, and you never have to explain your life choices to anyone. But you probably know exactly how it feels to always be the only person who's sober surrounded by folks who love to party. Do you typically end up becoming the designated driver whenever you go out with a crowd? Are you the person everyone can trust to make the wisest decisions during a night out on the town?
With sobriety comes responsibility. Your friends might be having a blast with their favorite substances, but that doesn't mean you have to join them. You'll relate to these memes if peer pressure just doesn't get to you.