When is loyalty to myself more important than loyalty to a friend?

There can be many circumstances in which loyalty to self is more important than loyalty to others. Usually those kind of circumstances are ones that involve making smart choices and being strong willed. Even though showing loyalty to others is good, they ultimately are not the ones to answer to at the end of the day unless they are your parents or God. If a person feels that they are obligated to show loyalty to friends then they are wrong because they don't have power over you and if you do show loyalty then it is by choice not by obligation. Many people make mistakes because they feel they must show loyalty to their friend or a group of friends.
One certain kind of situation where loyalty to self is more important than loyalty to others is, for example, if your goal is to maintain focus on school and grades but you recently told your significant other that you would go out with them for dinner. Some may feel that they have to go to dinner because they don't want to hurt their relationship. Others who have good work ethic and have their priorities in order would make the right decision to focus on school and stay home and study. The person who is loyal to themself is the one that is focused and chooses to stay home and go over school work. There are also situations where loyalty to others is more importantbut the truth of this is that noone has to be loyal to anyone because we have a choice.