I never liked drinking. I have always thought alcohol tastes terrible. Any time I drank was always where I felt I had to to fit in with my peers.
I never had a bad problem, but I had a few wild nights and for my health I decided to stop altogether. When people ask about it, which is rare, I just say I don't drink anymore, and typically the questions end there.
I wish it was that easy for everyone, but I know some social groups rely heavily on drinking culture and I hope younger people continue to grow away from that framework. You don't need a drink to enjoy your night, or time with friends.