How to Deal With Jealousy in High School

Jealousy is an adolescent according to a study that was produced in well not produced but published instead in developmental psychology right. Kids who are insecure or lonely or experienced insecurity or extreme loneliness tend to be jealous of friendships. So when they get into a friendship they are jealous of their friends friends to the point where it can erupt in physical aggressiveness or passive aggressiveness. Where they are ignoring their friend and their friend has no idea why. That's basically number high school. How do you ever make it through there? I don't know.