Don’t be sorry. Even if the person is insistent that you’re needed for this project, don’t worry—they’ll find another person to fill the need. Nothing in this world has failed because one person said “no” to a request—if the need was great enough, another person filled it. So while there’s a temptation to feel guilty that you’re ruining something good for someone you care about, don’t. That person will still get it done without you.
