I stopped drinking 2 or 3 years ago, main reason was that I injured myself when pissed and didn't realise till the next morning and for a couple of months afterwards
The only way to give up is to stop, do not ease yourself off, too much chance of having just one more.... and one more......
If you go to the pub, have a Lemon Squash or some other non alcoholic drink, you'll cop a bit of flack from your mates though it dies down pretty quickly.