A novella has generally fewer conflicts than novels, yet more complicated ones than short stories. The conflicts also have more time to develop than in short stories. On AC we define a novella as having less than 20 chapters. 
The following nominees were up for the challenge. They took on breast cancer, friends reuniting, old west outlaws, kidnapping, and a mundane 9-5 world in 20 chapters or less. 
The nominees for Best Novella (less than 20 chapters) are: 
 A Million Little Things by Mare
 Journey of the Heart by ResaD
 Seven Days by evergreenwrite
 r83
 Story of My Life by Carter-Orange
 The C Word by Sapphire
And the winner is... *GASP*
WAIT! What's this?! Never before in Felix Award history has this happened. A perfect tie. The WINNERS are: 
Winner: 
A Million Little Things by Mare
Winner: 
Seven Days by evergreenwrite r83 Runner Up: Story of My Life by Carter-Orange
Runner Up: Story of My Life by Carter-Orange