Everyone is always wondering why I smile for no apparent reason, I smile mostly because I notice stuff that I think is amusing, and no one else notices. Sometimes I smile to cover the tears. But mostly I smile because I think someone else needs one.
You are the most important in your life. Who you are and the choices you make influence everything that you do. Make sure you are the person you want to be, and then you will be who you need to be for the person who compliments who you are.