Loving an addict/alcoholic is hard work and unfortunately sometimes we have to resort to tough love. What it comes down to really is, how much are you willing to take? I have 2 adult children who are substance abusers. I finally had to draw the line in the sand, so to speak, and tell them I cannot tolerate watching you abuse yourselves and allow you to disrupt my life any longer. It is difficult to do but you have to protect yourself, alcoholism affects the entire family and until he is ready to come to terms with his illness there isn't really much you can do to support him.
Have you considered support groups for yourself? Sending thoughts and prayers your way. :hug