Always remember yourself that it's not your fault. Your colleague and your boss is very unprofessional. Don't be like them, don't start playing childish games.

Always remember yourself that it's not your fault. Your colleague and your boss is very unprofessional. Don't be like them, don't start playing childish games. Concentrate on your work , start looking for a new job, and leave. Any attempt to change their behavior is in vain, you can't change someone's personality (or at least it's not your responsibility to do so).