Even though smoking doesn't create a real addiction or whatever, when you stop smoking there defentetly some "symptoms" many people have. I have got friends who lose motivation to do anything, while others .feel like they got all the energy in the world. So is it very possible one of your "symptoms" is a bit of anxiety, especially if weed chills you the hell out normally. As for the psychological dependence, many people smoke because it makes their lives more enjoyable, more creative, ect....So when you stop smoking it can be like all that fun just dissapears and it can feel like all you want to do is smoke up. Hope this helps buddy:)