OP (and anyone else who cares) - I am an 11 stone man who used to drink double what you drank and who stopped without medical help or tapering off. If you are at all unsure, do contact your GP - but normally, when a GP says "don't go cold turkey, it's dangerous," they are talking to someone who is more in the bottle of spirits a day league.
I haven't had a drink for some time, I feel fantastic about it and I don't miss it.
I have done this one day at a time with the help of AA.
When drinking I never thought I'd say this sort of thing, but AA is brilliant and I actually enjoy attending. Men are in the majority, but there are plenty of women and plenty of 30 somethings and even 20 somethings.
Give yourself a shot at a happy life without drink and give it a go.
PS poster who talked about "DTs, whatever that is" - DTs is NOT just "the shakes", which lots of us get. DTs is shakes with accompanying hallucinations. Very unpleasant, apparently.