Yeah, protect yourself I'd say. Not everyone needs to know all the details.
"I'm taking a break," is sufficient explanation for now until you come up with something you feel fits better.
I say that to acquaintances sometimes. It's the truth. My break will last until I die. No need for me to go into the whys and wherefores.
At the end of 90 days maybe it will be, "I liked being alcohol free so much I'm going to keep it going!"