Creepy guy who randomly claims to know me.

Hi. I am 25(m) and this happened when I was around 19.<br><br>I was working at my part time job which is in a popular mall in my city. It was my first job and I was pretty excited about it, I worked there as a sales person. I worked only one shift a week in the afternoon (around 1-5pm).<br><br>One day, a guy came and asked to speak to one of the employees and my boss spoke to him. After a couple of minutes my boss called me over.<br><br>The guy said that he knew me from highschool. I don't remember what his name was like, he claimed that his first name is Z. I asked for his last name but he didn't want to give it to me.<br><br>He told me he went to the same highschool that I did, and we had a class together. I remembered that we had a class of English language, but that's all I remembered.<br><br>I asked him what his last name was so I could check the names in the school register, and he said he didn't want to give it to me, and he asked for my phone number.<br><br>I refused and told him that my parents monitor my phone account. Then he asked for my last name so he could find me through the school register, but I didn't want to give him my last name, so I left and came back to work.<br><br>After that he kept coming every day I worked and kept talking about the highschool days. I was always very careful not to give him any information. <br><br>I couldn't find anything on him, so I went to the school to ask them for information about him. They told me that they don't have any information about him, and that he didn't attend the school. I was very angry, and I went back home.<br><br>A couple of weeks after that I was walking around the mall and I saw him. He saw me and asked me if I had time to talk to him, so I told him I didn't have time. He kept following me and asking me to stop and talk to him, but I kept running away.<br><br>After that I stopped working at that mall and started working somewhere else, and he never showed up again.<br><br>I still get chills when I think about him, I was so afraid of him and I didn't know what to do. It's been years since then, but I never forgot about that guy.