Near the time when I quit drinking, every time I would drink it would be: "Just this last time, I'll quit on Sunday with a fresh start," believe me there were a lot of fresh start Sundays.
But this doesn't have to be you. Seek medical and psychological help if you think you need it to quit. And don't kid yourself, just don't drink. The longer you go the harder it'll be to come out of it. You can do this.
Drinking is hard on you, but the initial impact of quitting can be harder for many people. It is an emotional hell ride, but realize these emotions you are feeling. These are what you need to deal with physically, mentally, and spiritually. Alcohol is just putting them away for another day. Don't let that shame drive you to drink, find the drive to rid yourself of that shame instead of pushing it aside.