Honestly, I have a deep depression every autumn. Don't wanna talk about the reasons for it. But I can give you some strong advices how to deal with it.Firstly and the best one would be to move somewhere for a few weeks or even a month. More life communication.Try not to be 1 v 1 with your brain almost always that was kill. Alcohol,drugs is the worst thing that you can do in depression. Good luck man , be strong!