Sillygoose2016

My abf is 55, unemployed (ok, woefully underemployed, working pt for a meat market making near nothing,) and living with me and my teenage son, since the first week of January. This is something I fought and he just showed up with his stuff after he lost his apartment. I knew how this would go and it pretty much has. Making us feel sorry for him, manipulating us, not paying his share. I have talked to him many times that he needs to leave. Back story, I moved to this state so my so my son could go to a particular school for health reasons, my abf is the only person I know, I also work from home. My stress has been out of control and I am starting to get sick. His friend came to buy his truck, he has 2 cars. After 2 nights gone, no idea where, none of my business, he came back to my house stinking drunk, no sleep, no shower, came back to get his hat for work, , it was pathetic. He started in on me and his usual verbal abuse, this time my son he included my son in it. Too far. So, as he left, he said just wait to see what happens now. I guess he is at work. He has no keys, garage opener, and nowhere to go. I know what I have done is right, but scared. How does one make sure they stay safe from an unstable person, if they have not done anything yet? Thanks in advance.