Make an honest assessment of yourself as a person. Are you strong and independent and have a lot of self-discipline? Well, maybe you can quit on your own without a program. I know one former alcoholic who did that.
If you don't fit that description, maybe you need the help of a program.
I was so sick of drinking that I decided to try ANYTHING and EVERYTHING I could find to help me quit and stay quit. I found an outpatient program and still use it to meet my therapist once a week. I started going to AA and attend meetings every Monday and Friday night. After about 5 months I started with an AA sponsor.
I used antabuse in the beginning.
I also use my family in my program: everyone in my immediete family is aware that I am trying everyday to stay sober. So they have agreed not to have liquor in the house.
I often refuse invitations to parties if I feel I will be tempted to drink.
It is as they say, one day at a time.