Don't let your happiness be controlled by something you can't control. There are many things in life that we have no control over. You have to decide not to let those things determine how happy you are.
Your happiness should come from inside you. You have all the happiness you need within. You can choose to be happy at any moment.
Happiness doesn't come from outside circumstances. Those can change. What doesn't change is what's on the inside.
No matter what happens, you can choose to live in the moment and not let things get to you or bring you down.