txjet ~ I get the distinct impression that #1 - you feel you are a victim. #2 - that you have done nothing wrong in your marriage.
I really REALLY hope (especially for your kids' sake) that you will take the time to be introspective and realize that your wife can't totally be at fault.
You said she spends more time on her hobbies than her marriage. Is she not allowed hobbies? Is her only focus supposed to be you?
....Understand, that I can't, not be what I am I'm not the milk, and Cheerios in your spoon ~ Avril Lavigne ~ ..."Nobody's Fool"...