I think in giving advice to young people, too often we overlook that they are experiencing things for the first time. From love to heartbreak, we apply our view to how they might feel.
Instead we should validate their feelings. They are strong and teenagers are dramatic because if feels overwhelming. What we can do is explain that things will get easier. With age comes the lesson that heartbreak is not so bad because we have gone through it. We learned that we will be okay. That good follows it. Then the next time heartbreak happens, it affects us less because it is not the end of the world. It is life. This is not numbness, but an overall appreciation aat looking at our lives as a whole and not just focusing on the heartbreak.