In my opinion people exclude others for many reason and some may include jealousy. I think this is very noticeable especially in groups of students. They tend to exclude even their own friends sometimes, and I personally don’t think if a friends is excluding you that they should still be called your friend. People get excluded when someone else doesn’t like them or wants to take the spotlight for themselves. This could be for many reasons inclusions self insecurity or just to be plain mean. It all depends on the situation. But people ostracize others to have more themselves so envy or greed but also because they want to hurt others on purpose
