The Palm Beach County AA Intergroup is at 1371 Okeechobee Road West Palm Beach, FL 33401
You could go there and purchase a "Big Book". The stories of other alcoholics in that book may speak to him and give him the idea he may need real help.
Their web site is
Palm Beach County Intergroup of Alcoholics Anonymous
You can find lists of AA meetings there if he is interested in going. And don't just listen to me, Mizzuno is spot on as well.
Also, check out the friends and family section on this website. As an alcoholic, *I* am a poor support for your needs, but there are lots of people here who have had very similar experiences to yours.