How do you gain your boyfriends trust back after you broke a promise?

I am not sure what you mean by "duties." These are the rules when you are dating someone. Remain faithful Have respect for each other If you don't want to lose your virginity, that is your decision and "going" with someone is not marriage so you don't have any obligations in this department with your boyfriend. If your have been unfaithful it will take time to heal (that is if your boyfriend still wants to have you around.) People aren't perfect and we all make mistakes, and you obviously have made one. When any of us hurt someone that is a scar they bare and one that only time can heal. I suggest you sit down and talk to your boyfriend about how you felt at the time you made "the mistake" and remind him that all people are not perfect and you can only learn by your mistakes. Good luck Marcy