My friend has an addiction to WoW

Being that I am a photographer, I understand having a passion. However, when one of my closest friends talks about WoW, it's as though nothing else in the world matters. His eyes light up and he talks for hours about it. We all know that this has to stop. During our computer classes, his internet page stays only on wowarmory. He won't hang out with us outside of school on raid nights and he only cares about being home in time to do 2v2. It is getting sad. Any conversation somehow gets turned into, 'so we raided... last night.' We are all worried about our friend. I jokingly showed him the WoW addiction test posted on this site. He scored with two yes answers. This did not convince him at all. All we want is our friend back :/ He is a level 80 death knight and now he is on a mission of leveling up his level 65 druid. He even skipped school yesterday just to gain five levels on the druid. Instead of realizing that he is missing out on memories from his senior year, he finds himself being cool, bad, and awesome. He doesn't even want to go to his prom! Right now he is on wowheroes.com with the thought of what I am writing as simply a joke. I don't care if he wants to have fun, that is fine, but when he chooses a game that is more than repetitive over his friends, it's a whole different story. Help me find a way to get our friend.