['My coworker recently got the big promotion I was working so hard towards.', "Yikes.  I'm sorry to hear.  Will there be other chances available for promotion?", 'Not for a long time. I was pretty upset, and wished it was me.']
I'd be pretty upset, too.  Did anyone give a reason why your coworker was chosen over you?
My coworker recently got the big promotion I was working so hard towards. I was pretty upset, and wished it was me.