I was a binge drinker for about 6 months, and like you I quit on my own without rehab or withdrawal. I was able to figure out that I was using alcohol as an unhealthy coping mechanism, and as an escape. I don't think it developed into an addiction.
I waited about 2 years before I had another drink, and it was okay, I think because I understood my motive for having the occasional drink (no addiction or compulsion, not as a coping mechanism, no peer pressure). I do have the occasional drink, but they're very few and far between. The works for me, maybe not for others, may or may not work for you.
I think you would need to understand your limits and tolerance, and your motivation.