I think the real question is: what is the root of your unhappiness? Is it just your life situation? You don't like being married? You would rather be out at the bar hanging with the other single guys? You just looking for some strange?
I guess what I am asking is She really the problem or is it something else? You guys have been married for almost 7 years, meaning you were what, 21 when you got married? Are you feeling like you missed out on the whole "sowing your oats" portion of your life? Do you guys have different life goals now? Do you just not love her anymore? This is one of the reasons I don't think guys should get married till after 28 and women after 25. We all have "urges" to work through before settling down
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Anyway, just some questions to ponder.