When you finally reach your bottom you will have had enough.
He is not relapsing because he is not in recovery, he is just not drinking for periods of time.
This is a progressive disease, this will get worse and continue to do so...until he stops drinking and works a strong recovery program...for life...there is no cure for this disease..it is only a matter of whether he is drinking or not...that's it.
Your life with him will be a rollercoaster ride, strap yourself in and get to some Alanon meetings...it will help...also, take some time to read Codependent No More...it is a good starting point...for you.