A common but sad situation. You own HALF, regardless of what he says. If together you can not agree at what price to sell the house and how the proceeds will be divided. Get thee to a lawyer. He is living there, assuming rent free. He may be paying the expenses, but that goes with him renting. You may have a right to some of the ascribed rental income. Giving legal advice can be touchy. Best advise is to employ counsel. You could file for a petition to partition, In that action the court takes over, appoints a commissioner to take possession, sell the house and equitably divide the proceeds.
Answered on Jun 17th, 2013 at 7:46 PM