i m going to give you the advice that no one else will. if you dont like it pretend it's food.
as a christian, my bible tells us that the only way of divorce is by adultery. you may separate from her, but i really thing you should give your marriage a try. for example have you ever went to counseling.
have you ever tired to talk to her about how you feel w/o being angry.
i know how hard it can be when it looks like only one partner is trying and the other is not.
does your wife work a lot and that's why she doesn't do anything, or when she's home she could do more but don't.
i think you really need to talk to her about every thing from the kids, to her business, health insurance, etc.