You cannot control whether he takes you seriously or not. You never will be. But the one thing that will help is if you actually ARE serious about changing your situation. The best we can ever do is take care of OURSELVES and let others' chips fall where they may. If that means moving out for you, then that's what it means. If not, then not. But I can't believe that living in this limbo of waiting for him to "get it" is doing you any favors.
Sometimes, in order to chill out and gain perspective on a situation, the only things that will help are Time and Distance.