I am not sure how long you have been playing this. The main reason it is so difficult to quit the game is because if you have invested alot of time into it. Then pretty much you have been abusing your friends and all other aspects of life such as work and so on. Which means if you quit you have really nothing else to do. Meaning that the temptation grows even higher to go back to a world where you think you are something. I actually just quit umm, like 3 weeks ago. I have been lucky because I have a extremely steady job and that keeps me busy. Now though I am on a week off and I might go stir crazy and have to come back to the game. Really though realize this, I had invested alot of time pre burning crusade. Then once the addon came out, all of my gear and so on, is pretty much obsolete. So what is really the reason to play after hitting 7, if they are going to do it again. My suggestion to you is quit and start playing other games as almost a helper to get off the wow drug and then eventually just start doing other things to entertain your time, until your completely off of it.
Why am I the only one that thinks 20 dollars a month is nothing. I mean realize how much new games are and 20 dollars is cheap, I find wow is a great alternative to buying new games and well nearly saves money in the long run.