From your description of the situation it seems this other person may have a civil case against you to recover the money he says he loaned you 5 years ago. He can sue you in small claims court (like the shows on TV - Judge Judy, People's Court, Judge Joe, etc.) and get it decided by a court - if the amount he seeks is under $7500.
His "Harrassment" of you is a criminal matter and if he trespasses on your property (i.e. does not leave after you tell him to) or sontinually contacts you after you have told him to stop, he could be charged with Trespassing as a criminal offense and / or Harassment.
Answered on Nov 10th, 2016 at 6:58 AM