you don't like crying, right? so you must prefer smiling, because you know smiling will let people forget everything unhappy. every day, we see teachers or students and say, "hi/hello! how are you?" at the same time, you are smiling, right?
smiling can let you have more friends. with a smile, people will know you're a kind person. they will talk with you, so you will have more and more friends.
so i say, smiling is like a flower, the sunshine, warmth. it will give you happiness.