I don't believe I was ever "addicted" to marijuana, but I was dependent on it for some time. It was the ONLY thing that helped me with crippling anxiety...until recently. HRT has completely changed that in me, and I don't have a dependency on weed anymore. I still smoke it, and ocasionally do psychedelics about every 6 months. Don't intend on stopping these, because A.) One is due to my spiritual beliefs and B.) both have been proven as non-addictive substances and both have been shown to have positive effects.
That being said, I think I'm addicted to a pattern of food consumption. Last month I dropped 40 pounds, and somehow today, being stressed out by many things, I walked into a terribly bad buffet that I knew wouldn't have good food and ate my fill. I need to get over my addiction to food....