From experience, I have come to understand that anyone too happy, talkative or too friendly has a very weak or dark side they are trying hard to cover up by over expressiveness instead of facing their fears square on. That is why we see people a lot of seemingly happy people get depressed every now and then when their happy cover can no longer be sustained. I am always careful with any person who have a flashy personality, most of them are broken inside and when you get close to them, you can be very surprised at what you discover. Some of those kind of people are living in denial of reality, their flash of happiness is just a coverage, they are not really happy beyond their facial expression.
This fact reflects a deep observation. To understand a person's mood behavior and happiness, only an outward smile is not enough, but it is also necessary to feel the hidden state behind it. Some people use silence, smile and cheerfulness as their support instead of expressing their worries.They become happy themselves by seeing others happy. Such people look very strong from the outside but in reality many worries and emotions are hidden in their hearts. Their cheerfulness should not be considered as their weakness because they are enduring many things inside and are fighting a lonely battle. The real beauty of life is that despite their own sorrow a person causes happiness for others from their own self. Such people are truly valuable because they make their environment bright and pleasant with their words. Therefore, it is better not to judge every person by their happiness and smile, but rather to value their feelings listen to them and understand their emotions.