I think SO many people overlook this very fact. Most people don't need alcohol to have a good time however it's called a "social lubricant" for a reason.
Sometimes people just need a tiny push to become less self conscious or less introverted. Life is short. You can spend years trying to be healthy and perfect but you need to ask yourself whether you're happy while doing that. If the answer is "Yes" then great. If it's "No" then you should reevaluate your path.