Confidence shapes how a person thinks about themselves and how they act toward others. It helps them feel ready for difficult experiences and can give a more positive outlook on life. Getting into fitness will definitely boost anyone's confidence and make them feel better about their appearance. Getting the body they desire will help make them feel comfortable in their own skin and open up about themselves.
Not spending time with friends or family because you don't feel comfortable in your own skin or don't fit in with the rest of the group
Avoiding to go out to certain public spots such as the bar, beach, park, etc... or public events such as festivals, concerts, games