People ruin every thing

There are people who hurt and ruin things I can not get why they do that two people that i know do it alot on likes to bring people down the other likes to try and ruin things and when they get caught for it they lie and say they did not do it I know that they are the one doing it and they just don't hurt me you hurt my Friends OK you pushed on of my Friends get picked on by these two alot and my Friends and I have had enough and the people that hurt you just keep on trying to come back and be your friend  one had a really bad temper

picteur from here