I know this sounds repititous,but how on earth can i stop my mentally impaired father?

from giving me a nervous breakdown im ready to sn-ap! his aide puts him to bed at 7:30pm and hes up at 8:30 knocking on my door asking stupid off the wall questions,i tell him i dont know wht hes talking about and instead of leaving he keeps on jabbering in my face and getting madder by the minute if i dont respond.one of these days im going to take off or commit suicide.hes painted me in a corner with no way out,he really belongs in a home.what the heck am i to do??