Hi friend, good luck to you... CGAA has some resources for family and friends of gaming addicts, including (I think) a support meeting once per week they can join.
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Gamequitters also has resources for family and friends, including spouses. For example:
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I've also read the book Cyber Junkie by Kevin Roberts, and my wife has as well. It was very helpful for her to understand the background of gaming addiction. He has resources for family in the book as well.
This one was interesting, more of a memoir and I don't agree 100% with everything in it, but definitely something that should be read and discussed these days: http://www.amazon.com/Cyber-Junkie-Escape-Gaming-Internet/dp/1592859488