Parents don't get that, though. They don't understand about the fragility of teen friendships. They don't understand how easy it is for things to break apart, how someone you thought would be by your side forever can just disappear, or turn on you, or decide she likes someone more than she likes you. Parents always talk about romantic relationships being so ephemeral and fleeting in high school. What they don't get is that friendships can be the same way.