bully

Someone who is completely insecure about their own physical appearance or mental abilities. A bully can be a friend of many years, someone you don't even know though they are often spurred by jealousy they will isolate, ignore, tease, make fun of and ultimately mentally or physically abuse you. Can often be so subtle that other people don't even notice so you once again come out in the bad light. Bullies usually are not to be worried about but can often put a huge amount of stress and anxiety on a person. More so hurtful if they are a close friend. Don't worry though, bullies often end up lonely and without friends, you are strong ignore them :)