How can I keep ghosts/spirits away period. The good, the bad, and everything else

 Ever since a loved one passed away and visited me in my dreams I've been bombarded by other spirits when I'm just trying to get rest. It's stressful and I want to be left alone. It's currently only when I dream, but i want to keep good, bad, evil and everything in between away. I don't want to have there stress become my stress and I don't want to help them(1. Because I'm not capable and 2. I don't want to interact with them at all.) Please help. Everything I read is how to keep the negative away but I want it all away.