"Someday everything will make perfect sense. So for now, laugh at the confusion, smile through the tears, and keep reminding yourself that everything happens for a reason." Even if someday it doesn't make perfect sense, it happened for a reason.
How to be happy? The essential questions to happiness. They say you have to think 3 positive things for 1 negative thought, in order to be happy. How can you know you are happy? Can you be depressed and happy in the mean time?