Alchy.
By all means try to cut down and taper off (there is anther recent post on this with lots of good advice). In my experience it will be a time to learn about what you are facing, but will not lead to abstinence.
I do think you should have some medical input. Is there a free detox centre you can ring to see how much at risk you will be / advise etc. There may also be a telephone advisory service that can help on the advice front.
From what I have read in other posts- if you use machinery or drive at work it might be very risky to go cold turkey.
Let us know how you get on- take care