Dear Seriously Annoyed Boy,
Thank you for your email. I am sorry to hear the story of your best friend, Mark, having a serious video game addiction. Let me give you some suggestions for your friend.
As Mark spends almost all of his time on playing video games, I suggest him setting a timetable for himself. It can help him understand when his free time is and how long he can play video games for. In the end, he can reduce the amount of time spending on playing video games.
I suggest Mark seeking help from a social worker or a counsellor. He can get professional advice and treatment to deal with his problems in effective ways.
My third suggestion is telling him to join other activities or develop a new interest. Joining activities can help Mark make some new friends. Then he will not feel lonely and he can have fun and new experiences from various activities. Also, Mark can develop a healthier lifestyle and overcome the addiction.
I hope that my suggestions can help your friend quit his gaming addiction. If you still have any questions, please send me an email again.
Yours sincerely,
Dr. Q