I know my boyfriend is mentally disturbed 
He was sexually abused by at least 7 people as a child including his own brother and grandfather. 
His mother let it happen and trys to play dumb. His whole family is full of convinced pedophiles and extremely disturbed people. 

He acts like a child sometimes and has EXTREME anger outbursts and he changes like a flip of a switch. He is extremely sexually driven. He also is just so lost and messed up. I feel so bad. He doesnt have insurance so he cant get therapy. We've tried. Hes kind of scary. One day I think he may hurt someone. I dont know how to help him. Hes kind of mentally abusive to me. So I have my guard up. Any advice? I dont want to leave him. I adore him.