Hi, Jackie! Welcome to the forums.
Your instincts are correct -- when he is drunk he may get behind the wheel and kill himself or someone else or he may do something harmful to himself.
I would suggest Al-Anon. We have an Al-Anon email meeting here at the club, or there may be a local meeting near you. Look in the phone book, or you can search online here:
http://www.al-anon.org . There is also a wide selection of online meetings, which you can browse here:
http://www.ola-is.orgBeing an alcoholic myself, and having had several relationships with alcoholics, and having looked into the illness quite a bit, I can tell you that if your friend is an alcoholic and he continues to drink -- things will get worse.
My advice? Tell him to stop drinking or get help or you are out the door.
Dean