I didn't keep my promise

When Club informed about Halloween party, I felt so much energy. I invited my friends to join and of course, we were the first group registering to this program.
Unfortunately, I didn't have enough confidence as well as preparation for big event like this. And I decided to quit at the last time.
Club criticized me, and I felt really bad. I hope the next time when I am gonna join an event, I should think carefully before making decision.