well your first part i agree with, so i'm not going to suggest anything for that, otherwise i'd be admitting my own idiosyncrasies...

however for the fear of someone trying to kill you, that's something that you may want help with, talk to someone...there's ways of treating these issues, and there's more to it than paranoia...there's anxiety disorders, schizoid personalities(not schizophrenic yet ) and just general maladies that can be responsible for feelings like this...just talk to a proffessional...