The best way to detach yourself from this game would be to simply uninstall it, but for some this is just far too difficult. Some may just want to never open it again.
In the case of this just remember that there is nothing forcing you to open the game every time you launch up your computer. You are not a prisoner to the I Wanna Be The Guy community. You are a free being. Once you get out of the pattern of opening the game you will begin to feel free and less stressed. You will have cleared your mind of all bad. You will be happy.

The next thing that you will need to do is go outside. This is a completely free activity, so there is not a worry in the world. If going outside is too strenuous for you, you could always ask someone to bring in the grass for you. Either way you must do so to truly become human once again.

After doing this you will finally be able to lose the NPC life and rejoin society. Your fellow citizens would be proud.