My brother arrived unannounced and in a bad state. I had limited contact with him for about half a year, because he can be a major prick at times and he had seriously crossed a line that time. He's not well and erratic and I suspect that he is on something (he has used drugs in the past). I have tried to call his girlfriend but she didn't pick up, so I am not sure what happened but something must have or else he wouldn't be here?
I'm really not sure what to do because I'd prefer it if he just went home but I don't want to just kick him out either not knowing where he will go. He's not aggressive but it still annoys me that he just came her as if nothing happened. Can I expect this high to have worn off tomorrow, so I can send him back home or how long does this sort of shit last?