I live in CA. My x lives in OH. He has custody of our oldest son. He has had custody of are five year old son for over 2 years but he has been living with me the whole time. I want to know if I can file for custody here in CA? I lived in CA for around 4 years. So most of my son's life. I have been taking care of him his whole life. He doesn't pay anything and he isn't in his life.