DS2 in crisis?

My youngest son is in crisis. Everytime he speaks to his father he completely falls apart, which I totally understand but my heart goes out to him to help him through this period in his life. He is angry with me, he wants to live with his father, he idolizes his father (who can do no wrong in his eyes) he doesn't want to live in the house, with me, with anyone, he has a bad temperment and attitude. He is sassy, beligerant and downright disrespectful to me and everyone around him. He is in need of therapy I know, I have a call into the doc's office to get this started asap. I just want to know how to fix my little boy who is struggling. It makes me sad but he wants his father back and I can't go there. He thinks he is the man of the house now and can make all of our decisions for life for us, UM no you aren't, you are 13 and need to deal with your problems and let us worry about the rest for now. I know he's feeling the strain and disappointment that his father and I are not getting back together but from what I am hearing I am the only one he lashes out at, his father says he's perfectly fine there with him. As much as I hated to offer this option I asked if maybe he live with him for a while and adjust, come visit me and let things cool down, his father downright refused. I'm tired, stressed and well just about at my wits end also. I know this too shall pass, but at what price to me, my other kid and well our family dynamic. Things have changed I try to explain this to him, but WOW what a drama king he is being!! Sorry for the rant today guys, usually I'm so upbeat but I'm tired, downright drained and well I need to get this off my chest now!