I second Terry's suggestion. Drink an equivalent amount of water for every beer you drink and you'll find yourself cutting way down. Also, for me anyway, I find that if I drink the really dark beers, like Guiness or some Bocks, I can only drink 1 or 2 because they are so filling. It's the light beers that will get me in trouble because they drink as easy as soda, and before you realize it you've finished a six pack.
Also, keep in mind the difference between being an alcoholic and being an alcohol abuser. If you find yourself craving a drink every day or thinking about it all the time, you could be at risk for alcoholism. If you are the type who doesn't crave it, but if you've got it in the house you'll drink it till it's gone, you're at risk for being an alcohol abuser. I think there are more abusers now in the US than alcoholics. A lot of people don't have a drop during the week, but then get completely sloshed on the weekend or their days off. They aren't alcoholics, they're abusers.
I have worked with a lot of guys who make sure not to buy alcohol in large quantities so they won't drink too much on accident. I say accident, just because it's so easy for a couple of drinks to turn into 4,6, or 10 without really thinking about it. If those guys want a beer that day, they'll buy a couple of tall boys on the way home from work, not the 24 pack that will get them in trouble.
Anything can become an addiction, including going to the gym or being a health nut. Moderation and variety seems to be the key to about everything in life. Before I completely swore off alcohol, I'd give some of the moderation advice here a try first. Don't keep enough in the house to over-drink, take up some other activities, and drink a lot of water. If you do that, and then you find yourself constantly running down to the gas station to pick up a six pack after you drank the only 2 beers you had in the fridge, then you might take it to the next level and abstain completely.
Unless alcoholism or addiction run in your family, or there's a little more you aren't telling us, I wouldn't beat yourself up over it too badly. That said, not affecting your work or relationships doesn't really mean anything as there are more functional alcoholics than there are those who get so bad they can't keep a job or family, so you can't really use that as a measure of if you're an alcoholic.
And for full disclosure, I typically have between 1 or 2 drinks a day, except the 2-3 days a week I work out, where I abstain. If I'm too lazy to go to the store, I might go a couple of weeks without a drink, which happens quite often because I can be pretty damn lazy. Once every couple of months, usually on a Saturday night, I'll have 5 or 6 socially (typically because I'm trying to get lucky with the wife). When the full force of the JW deception hit me, I overdrank for awhile, but that was abuse, not alcoholism. It didn't take too long for me to back off, (perhaps like you are trying to do) and find a happy medium.
Take all advice, including mine, with a grain of salt because everybody is different, and what works for some won't for others.