Your reward centers are all fucked up. You get bored easily because gaming gives you such a quick high. It's like being addicted to porn.. or smoking.. or anything else, really. My advice is to do what you have to do to start limiting your exposure until you have control over your addictive personality. Also, like someone else in this thread said.. it may not be a bad idea to go back to your day-job until you have this figured out.