If your marriage is no longer working, you have the option of filing for legal separation or divorce. (info.legalzoom.com)
A person may not file for legal separation if his spouse has already filed for divorce. (divorcesource.com)
If your spouse had a larger income and carried health benefits for the family, consider filing for a legal separation rather than a divorce, at least for the time being. (familyblawg.com)