hello and welcome. sorry for what brings you here.
He told me about a month ago that he is done drinking and he's ready to start his life with me.
so the "talk" of sorts has already happened once. he SAID no more drinking, but he IS still drinking.
that should be a big concern, not only as a partner, but especially with someone you plan to marry. it wouldn't be a stretch to suggest that you withdraw the "fiance" title until he has proven one full year of unbroken sobriety. not 4 days, 3 weeks, or a couple relapses now and then.
what you see is what you get. he has a family history of alcohol problems. you can already see 5, 10, 20 years down the road. down YOUR road.
alanon meetings are free and local. and they are for YOU.