It sounds to me like he is putting a lot of the blame for the ending of the relationship on you.
Reality is he is an alcoholic & you no longer wish to live with one.
It is very common he has replaced you with someone else to drink with.
He doesn't sound genuine to me.
I suggest focussing on yourself & taking one day at a time.
You are definitely not crazy for feeling the way you do as many of us here have felt the same over our alcoholics.