Good luck pal. I stopped drinking nearly 4 years ago and it's probably one of the best decisions that I've ever made.
I'm a professional person who never missed a day off work through drinking, didn't drink in the daytime except at weekends but drank heavily every night after work. Probably a functioning alcoholic.
I can't really fully explain what made me stop, but it was like something just clicked in my head. I think watching my father die gave me a new found respect for how valuable life is, I think that motivated me to take responsibility for not wanting to waste my life in a drunken haze.
The other thing that helped me stop was I managed to get referred to a centre for people with drink & substance issues for twice weekly group sessions. I honestly didn't get much from the group sessions, but seeing the state that some of the other people were in & how it was messing their lives up gave me a kick up the arse to be determined not to end up like that.
You don't realise what bad stuff alcohol is until you clear it out of your system. I used to partly drink to self medicate against anxiety & depression and also to switch off from dealing with a lot of stress during the day, but it turned out that it was actually the booze that was causing a lot of it in the first place. About a month after stopping drinking and getting it physically out of my system this cleared up significantly. Three months later it had gone almost altogether.
I'm not sure I like the fatalism of some approaches to dealing with alcohol issues. Having to identify as an "alcoholic" like you are defined by this and some kind of victim of a "disease". People can change things if they decide that's what they want to do and I don't believe your future choices have to be defined by your previous ones. This probably explains it better:
Those of us who have contributed to the literature about models of drug depend...
www.counselling-directory.org.uk
Anyway, I wish you well.