I remember reading your posts way back when I first joined Avatar-Forums, you stood out in my mind because of the things you said back then. To see you here now saying you haven't changed after all, I find to be desperately sad.
We all have to fight that 'numbness', you say you saw things worth fighting for so why let go. Don't give up on what Avatar gave you man, find discipline and force yourself to change. There is plenty that Avatar and the Na'vi represent on this planet, community in the form of ToS comes to mind immediately. You say you still smoke and drink, if giving these things up is what you want then you can. You are in control, giving up is simply not extending your hand and giving in for that momentary pleasure.
I don't want to sound harsh or anything, I want to help you. There were so many inspiring posts by you and others when I first joined AF. Surely if you didn't want to go back to the things you spoke of back then you would not have made this thread