That person knew you from high school and still decided to make fun of you? It sucks that you had to experience it but to be honest that person probably has some personal issues that he is taking out on you. Dont pay it any mind and go on with your life and see it as a good thing that you didn't act out. Life isn't fair and all we can control is how we react to things and by not giving in and giving him the attention that he wants you won.