About a year ago me and a friend invited this one kid to go swimming with us at a creek and when we got there and got out of the truck he was all messed up so instead of taking him back i told him to call a family member to come and pick him up and he got all mad at me and a car came and picked him up and drove off later the next day he appearently went to the cops saying i pulled a gun on him and robbed him so they got a STATEMENT from me and the friend that was there with me. Later he was charged with perjury and me and my friend hafe to go to court to be a witness, but he has been harrassing me by calling me none stop so my question is do i hafe to testify against him? Ive never been to court and are really nervous so any suggestions?