Heartbreak of having to leave your love

I am feeling so much sorrow of breaking up with my partner. It’s been Four years since he was hospitalized in late stage alcoholism. He was detoxed and began a new life. The four years before that were a roller coaster of good times and bad times. Then the years of him not drinking, I felt safe and well loved. I had to step away this week after he relapsed again. I love him so dearly but the fear I have constantly and the (as you all know) lying to himself and to me. I explained this today and he countered that “he is not an alcoholic.” I mean I have eyes, I saw you pull a wine bottle out from under the seat of your car and drink from it while my back was turned and you were our “designated driver.” So sad to lose this love to addiction. We are older folk so this may be it for me as far as partnership and that feels sad too, for me to lose my person.