Welcome to SR Because.
When I first starting waking up to the severity of my exAH's alcoholism, I too wanted to believe that him getting better was just around the corner.
My first step was educating myself about the disease. I read and read and read for hours. And spent a lot of time, here, at SR.
I learned that, indeed, there are some success stories, but there are way more sad endings. I learned that even when they do manage do get sober, many of them have serious relapses over and over again.
I realized that for me, too much had been said, too much had happened, for me to ever feel the same about him. I simply couldn't trust him anymore. And that for me was the breaking point. I knew I couldn't stay with someone I did not feel safe with. Sober or Drunk.