Never is a big word. Like all of us you’ll accidentally allow at least a few people to get attached to your happiness when you’re young. But that’ll hurt so you’ll learn that’s a dangerous thing to do. If you do lose track of your happiness you’ll want to make sure you’re maintaining an awareness that you gave the happiness away as opposed to someone took it. No one actually has the power to take away anyone else’s happiness so this isn’t a challenge or a warning. It’s more a reminder: do not be attached, be attracted. You’ll definitely need being sad or angry or worried so you can even recognize being happy, but don’t let other’s behaviour dictate whether or not you’re happy. They always have the freedom to leave but you always have the option of what to think about that.