Here are some thoughts that popped up suddenly...
People go through a lot of shit happening in their life. They sometimes share it with others or sometimes they don't. There two cases
(1) if they have someone who they can trust a lot, they share with them what they are going through. That someone may be their parents (in rare cases as these days kids don't share anything) or with the person they are in a relationship with or may be with their bffs / close friends.
(2) some people just keep their shit to themselves. They don't share it with anyone. May be because they don't have someone to share or they just write it in a diary or they are reserved kinda people.
But what about those who just bury everything deep inside them?
Sometimes they pretend to be tough in that manner but eventually everything comes out at a certain point in their life. May be they had shared there thoughta, there feelings with someone and that person didn't understood or had made fun of them.
It's too complicated to study people's thoughts, there behavior, there way of reacting to a situation or a way of dealing with life.