I think you are not alone in dealing with certain kinds of depression which perhaps relates to existential woes, and all I can say is that you are doing the right thing to go out and enjoy, when you can. I've personally found that throttling back to more reasonable expectations is in my case a better answer than the "blitzkrieg" kind of recreation which, in my opinion, after a certain personal threshold of how much activity we try to jam in, for me turns out to have the opposite effect. Wishing you balance, peace and a tranquil ride!