Yes, it did. I was in one of the strongest guilds on our server and we raided every day, usually about 5-6 hours each night doing MC, BWL, etc. I played a priest so I was always in demand and they wanted me there pretty much every day. I would put off my friends to play, I would leave work early so I could get ready for BWL raids, I spent countless hours in front of my computer killing the same bosses over and over again. I even had a friend who was moving to Texas and who I may not see again for years (she is Air Force) come over one night and I was so addicted I sat there raiding while she hung out with my roommates while she waited for me to finish up.
Then the best thing possible happened I think. I had to start traveling for work in training and consulatations for weeks at a time, on planes and long hours in cars and meetings, so when I got back to the hotel I didn't want to plug in. I tried at first to keep up with the raiding schedule, but slowly I became too engrossed in work to keep up. After a few weeks I just couldn't login anymore with my schedule and I eventually gave the game and all my characters to my friend who originally got me into the game so he could have a second account, although I tried to pry him away from the game.
Now I spend my time with my friends, and I called and apologized to my friend in Texas who says she is glad I was able to get away from the game, because she was seriously worried about me. I heard this from several people who said I hid myself in my room when I would come home and they wouldn't see me at all. It makes me wonder how it all happened, because I played the game to have fun, not to work hard like a second job. I play other games once in a while, but I only play when I feel like it and don't let other people push "responsibility" of gaming onto me.