There is another option available to you in the state of Ohio if you want to separate from your spouse, but you do not want it to end in a divorce. A legal separation is an agreement between the court and you and your spouse, whereby you address issues of property division, spousal support, child support, custody and visitation, the same as if you were getting divorced. An action for Legal Separation is then filed instead of filing an action for divorce.
The grounds for legal separation are the same as for a divorce. Such a case proceeds primarily as a divorce action, with the exception being that you remain married in the end.