Shyness is a paralysing handicap of the mind. It is responsible for many, many difficulties we face in daily life, particularly for those involving relationships with other people.
Shyness makes it difficult to meet new people.
Shyness makes it difficult to make friends with people you do meet. Shyness makes it difficult to enjoy all manner of activities. Shyness acts on your subconcious causing you to continually consider how you feel, how you look to others, what other will think if you do this. Shyness prevents you from expressing yourself. Your mind is not free to analyse what you should say.