How do you get rid of an abusive boyfriend who does not have a job and no where to go and he refuses to leave your house?

Call the police on him when you are not home, so he cannot harm you. Make sure you tell them not only that he wont leave, but that he is abusive. If you're worried that he will come after you after that, make sure you tell them that too. They can help you out safely, don't try and do it on your own.