Can you bring your concerns up to your parents? Is there anything you could do with your brother that he would enjoy? Maybe offer to give him a ride to his friend's house sometime?

It could just be that you are two different people with two different sets of interests, too. One of my brothers was seriously into console games when he was around that age - my parents found some sort of device that would lock the TV so he couldn't play 24/7. He might have obsessed a bit as a kid, but he grew out of it in a few years-- still interested in games, but not to the exclusion of all else.