Has Cognitive Behavioural Therapy been suggested as a way of treatment? It might be worth looking into.

As for kicking alcohol, I used to like a drink or two but since my injury given it up and all but given up caffeine. It was hard at first but now I'm not bothered about having a drink, last time I had a beer I didn't like the taste much! If I go to the pub I don't have to worry about drink driving and just pretend I'm an athlete lol. Giving up drink has probably been the only good thing to come out of this.