Too shy
Some people consider them to be the introverts and try to explain their shyness in that way. Perhaps, it is comfortable to feel so in order to stay alone. But mostly it prevents a person to live a successful life. It is difficult to communicate with the shy people, but not every quiet person is shy. It is worthy distinguishing shyness as a personal characteristic and shyness towards a certain person.
To cope with shyness, you should start with the things which seem to be most frightening. For example, if you are afraid to speak in public, get some funny stories beforehand and tell them in the company of your best friends, who will not blame or confront you. The next step is to perform a short speech in front of the fellow-students or co-workers. Make yourself think positive. If you hesitate in speaking, repeat at home, while nobody sees you, stand at the mirror and imagine yourself in public. The shy people are not bad workers, though. They need motivation for the effective job.
When you have to communicate with some people, but you feel that this socializing does not make you feel comfortable, it results in the desire to escape personal contacts with those people. Hesitating is the result of subconscious wish of yours to stay apart, stop intercourse or be left alone. A person aims to use any kind of unconscious defense in order to stop the relationships which prevent comfortable and peaceful living.
So, shyness as a bad habit is easily treated with regular self-work and training to be more self-assured in public.