You can consult with an attorney or You should consider a Cashout refinance and remove yourself from the mortgage and deed.Get an appraisal on the house. Once you know what the value is, deduct the mortgage balance. That will give you the equity in the house. Since you are a 50% owner you should cash out for 50% of the equity. He can still keep the house you can take your money and move on! Call me if you need any help. I am a Mortgage Loan Officer!!