You have a good point about there being more to life than being an emotional yo-yo on the finger of a boy.

On the other hand, people do rather hope their love relationships go well, no matter how mature the other person may seem to be.

In the 19th century, it was very common to buck men up by asking them, "Is our happiness really so dependent on a fickle female?????"

The fact is that tough-asses who stop being vulnerable to the state of their relationships have some problems of their own. If you're carrying a little torch of built-in Christian joy in your heart, so equanimity comes easy to you, that's great. If you're just becoming callous, then welcome back to sin.