There is a lot of pressure on people to be confident, outgoing, extrovert, and think positive as well as on appearance, being thin/losing weight.. Its not on the outside that counts though cos a good looking person with low self esteem quiet isnt going to be as popular as someone who is less physically attractive but charismatic, has upbeat positive energy, confidence and personality. You can change from being shy, unconfident, passive to more confident, outgoing, interactive with people and assertive. You don't want to be either totally unconfident pessimistic or overconfident overambitious unrealistic. A lot of people who appear really confident aren't though on inside,and aren't themselves, they act extrovert, talk a lot, busy but are insecure. No ones perfect.