I have a very good friend who disappeared for six years after going out to work. I often dream about her, saying that she was killed and telling others that her family didn't call the police.

Do you still believe in ghosts and gods? What age is it now? Dreams come from thinking during the day and dreaming at night! As long as you don't take these things to heart all day, there will still be some nightmares caused by your anxiety. Pay attention to keep the sleeping environment comfortable when sleeping at night … so don't believe these things!