Welcome frostfire. Our addictions take on many forms, and while your drinking/binging pattern may not be every day it certainly qualifies as problematic for you. And that's really all that matters - whether you drink once a month or all day long every day, if it is out of control at any point it's likely a problem.
Glad you are here, and you are right that belonging to a fellowship of those seeking a common goal can be very helpful. SR is definitely one of those places and I hope you can stick around and share with us.