Most confident people live by a value system and make their decisions based on that value system, even when it's hard and not necessarily in their best interest. But in the interest of the greater good. Your actions and your decisions define your character. Ask yourself what the best version of yourself that you aspire to be would do, and do it. Even when it's really hard, and it's the last thing you want to do. In the long run, you're going to like yourself more and be prouder about who you are.