Am I being secretly dramatic or should I be concerned tell someone?
heart o' gold
You tell your parents or your pastor immediately.
Tell an adult at church, and they will talk to him. The person that you tell should understand your predicament and handle the matter with delicacy and tact.
Tell your dad that Mr. R is making you uncomfortable touching and tickling your neck and paying you way more attention than you are comfortable with. And you don't know what to do or how to handle it and ... can he give you advice?