A lot of people say happiness does not exist. They are 100% wrong, trust me i used to be un happy for 5 years due to abuse and bullying.
Studies show that hapiness comes from your heart, if you start being positive then everyone arround you will also be happy.
Happiness is the biggest algorithme in the entire word with the look of your eyes and finger prints.
To be happy just say to yourself that your happy it helps a lot with confidence and courage.