Hey Agent!
Sorry to hear that things are getting tough for you. Seasonal Affective Disorder is normally grim, but in the current climate, it is exceptionally grim. I can 100% recommend both our Discord Channel to meet and talk to like minded people and to look on our forums : https://forums.ubisoft.com/forumdisplay.php/2009-Looking-For-Group
The good thing about people who play The Division, is that they can find people also feeling a little under the weather and sometimes we see people coming together to help each other and even making life long friends.
I hope that this is something which can happen for you :) Remember it's always important to talk and there is always someone available to listen.
P.S s Capolan has suggested below, SAD light boxes are great for helping.
Lots of love Agent, keep safe