I need someone to tell me if I'm just being paranoid
What is going on that is making you paranoid?
I think my boyfriend is trying to kill me.
I see.  You should ask for advice or assistance from others if you are in a bad situation.
He's not really a bad guy but I can't get the thoughts out of my head.
If you understand that your boyfriend is not trying to kill you but you are still having paranoid thoughts, you should get help. A therapist might be able to help you out.