You can do this, anyone can. Read around on this forum and you'll see many who have and are now living good honest clean and healthy lives. I am one.
I think you missed the first step. The first step is accepting that nothing good that way lies and every drink leads to the same place. In AA the 1st Step is, "We admitted we were powerless over alcohol – that our lives had become unmanageable. ." Obviously that is the case here or you would just be able to walk away with no problem.
Admitting you are doing something that is detrimental and you do it anyway? That is addiction. Textbook, really.
So.
Acceptance is the key. Accepting that it is over, wave the white flag, alcohol won. That's the only way.