Your paying taxes gives you no ownership rights. You may be able to get those payments back, depending on what your agreement was with him, but with her being on the deed and your not being married to him [there in no common law marriage in California], you clearly need a local real property attorney who does litigation to help you. You also have to get your boyfriend, assuming he is mentally competent,to finally do something to protect you, such as naming you as a beneficiary in a trust and/or Will, excluding the ex-girlfriend, trying to establish that she owes him money for her part of the house, etc. You are in a very bad situation and need to act immediately.
Answered on Jul 15th, 2015 at 4:06 PM