High school can be the best times of your life if you have the right friend group. But as we all know, teenagers can be fickle with their friendships. Sometimes a group of friends who have been close for years can all turn on one member of the group to kick them out, which is quite painful for the person stuck on the outside. However, this r/pettyrevenge poster is still stuck in his high school days, even five years later. He's thinking of their high school friend, who ended up having a lot of…