A happy person can never entirely buy into the pain of a sad story. It takes you to have been there to exactly understand, likewise vice versa. This is why sometimes I feel like I'm in a lonely place, suppressed by fear and confusion, anger, pain and often regret.
Not everyone can truly understand the way we feel unless they have been in a similar condition. And most times, to avoid the stress and complication of matters the best reply to the question "How are you?" is "fine."
Another thing is we can't share our problems and situation with everyone except those who are close to us because some people may change the way they perceive you when they know what you are going through. Some situations are best kept within and settled by oneself atimes.