Only half an hour or so from Brighton, if you're driving, otherwise, yes, a bit of a drag, you can do the train to Worthing and the Number 1 bus to Storrington.
I had a similar story, used to give up for 6 months, or a year, then back on them, then off them etc. I decided to try hypnotherapy, did it in March 2007, and I've been off them ever since, and I've never even been tempted back.
I used http://chrisjones.uk.com/