Wow, you have really been on an emo roller coaster this past while. My heart goes out to you, as I feel that I am in a similar (though reversed) situation.
In my case, my husband is the 'puter geek. He is addicted to WoW, depressed, no interest in doing anything. No dreams, aspirations. Very little attention to me or our precious daughters.
I have gone to (and am still going to) counseling, read myriad books, tried various ways to change myself, and even various different ways to view marriage. None of it has worked so far. My religious views have thus far kept me from walking, as well as the fact that I don't want to deprive my kids of their Dad - even though he is not doing a great job of parenting.
So I feel that I can relate, and I sure do wish you well. It helped me so much losing weight, helped my self-esteem greatly. However, now that I value myself more, I am even MORE dissatisfied in my marriage! I refuse to make some rash decision that could have dire consequences, but I do fear that I am inching closer to it.
Best wishes
ABBA