Some people have bad reactions to alcohol with just ONE drink. I should know, I'm one of them! Fortunately I'm not a mean drinker, rather I have adverse reactions with my anxiety issues. I say this because for those of us who have bad reactions to the first drink, there is no such thing as moderation. The only real choice is to abstain completely.

Maybe this doesn't exactly describe your fiancé, but if things really are that bad with him, I don't think he should be drinking at all. If he insists on continuing to drink, I urge you to rethink your relationship with him. You don't want to be on the receiving end of that behavior for life.