I'm not a believer or follower of the Catholic church anymore but what could I possibly confess to the priest if I were to go into a confessional?

I don't do bad or 'naughty' things as it is not in my nature. I live a quiet and peaceful life and am overall pretty boring. What do you do if you go into a confessional and have nothing to confess? Would the priest be pissed of at you?