Is humor necessary in our lives?

In my life, I know people who don't have a sense of humor, they are always serious. I can tell you that humor is necessary.

First of all, I consider that humor is good because you're so happy... But I am a serious person and for me, humor is not necessary. 

Secondly, love, loyalty, respect, ... These concepts are most important because you can't live with a person who it always lie you. It's horrible!

After, neither you can live with a person who it don't respect you, or it don't loyalty... 

In conclusion, people who consider that humor is nevessary, it is their duty to learn how to survive without humor, because they can improve their lives with that.