After I read it, I recollect my gray childhood. At that time, I felt lonely but could do nothing to protect myself. Although I miss my parents very much, even had a plan to escape my living environment, I had to stay in my aunt's family to bear the frosty life. In that period, the frosty environment moulds me to be a cold and unmoved girl. I always sit in the corner, unwilling to talk with my classmates. At last I felt strange to face my parents when we live together.
Because of my experience, I think a living environment is the main factor to affect the happy mood. But the power which comes from your heart is the only medicine to cure your unhappiness.
You must be brave enough to force yourself outgoing, and learn the way to contact with other people in order to make a warm relationship, then you will never feel lonely, never act as a crab which is hard outside but sensitive inside, just like the girl before her change.