WoW ruins another friendship

Two of my co-workers play wow. One is 45, lives alone, and that's all I care to know about him. Another, who's around my age, I was hoping to save. I'm a good friend, or at least I try to be. But I'm giving up on him. The last straw was when I tried to hook him up with one of my wife's co-workers. 3rd girl I've thrown his way mind you. She was only available Friday, the day after I told him about her. He said he couldn't join us that night because he had to play WoW. He has a strict schedule of 4 hours a day for 4 days a week, and every Friday night just happens to be one of them. He said there is no way he could let his guild down. I understand to an extent, but when you promise someone 4 hours a day for 4 days a week, they have to give you some understanding when life happens. It was kind of a slap in the face. Me and my wife go out of our way to try to help him, but he doesn't care. It's not that he doesn't want it. He probably doesn't remember, but when we first started working together, I took him out and we got sh1t faced drunk. I passed out on his bathroom floor. But before I cozzied up next to the pee stains, I remember him saying how sad and alone he was, and how he was so ready for a girlfriend. My wife was out with us that night, and he could see how happy we were together. I knew then that I had to try to help him. But WoW got in the way of that. He spends more time leveling his character than leveling himself. Physically, socially, mentally, economically. I took him to the gym with me, and the poor guy can barely lift the bar. That's bad for a 6'2" 25-year-old, but his character can slay any beast in one blow. He's in debt up to his eyes, but his character has all the best gear and over 5k gold on any given day. He never wants to hang out with people in real life, but his in-game his character hangs out with other characters of people also sitting alone at home in front of their computers. I think me and him have the potential to be really good friends, but he doesn't see friendship beyond the game. I'm not in his guild. Any girl I try to introduce him to won't be in his guild. He'd never set aside 4 hours a day 4 days a week for either of us. He lost a good friend today, and I won't be responsible for ruining any innocent young girls life by trying to hook him up.
I actually have another friend addicted to WoW, but he's not so bad. He ditches the hell out of me for the game, but is otherwise rather social and has his life together.
I've tried WoW twice and deleted my accounts both times. I got a dwarf hunter up to lvl 20 two times, and a druid to lvl 16. But after that, it starts to get really fun, and I found myself playing more. So I quit because of fear of becoming addicted. I have a very strong will, but don't want to test it with something that has ruined so many lives. I have a wife, a baby, am trying to learn to play the guitar, and can almost bench 315lbs. That's two achievements, an almost completed quest, +140 strength(pounds I can lift more than my body weight), and I'm only lvl 29! ;-)