. . . That you are NOT ALONE.
I, too, struggle with depression and anxiety and those issues in themselves can drain your soul. Throw in all the crap that's happening in the world and it's just too much.
Remember, you are one person. It's great that you care and it proves that you have a loving soul. But you can step back if you need to from time to time in order to tend the quiet places within you.
(By the way, if I sound preachy it's because I'm telling myself all of this as I write to you.)
Whatever it takes to help you hang in there; do it. I prefer massive amounts of chocolate, to say-- weed-- because that's the only mind altering substance that I trust. 
And speaking of humor, I re-watch Randy Rainbow and Brooklyn Nine-Nine clips all the time. Sometimes, I need to cry, so I turn to other Brooklyn Nine-Nine clips as well as this one scene from an episode of Scrubs that makes me tear up every single time.
In other moments, I try to inspire myself with thoughts of amazing people who kept faith despite losses. I think of Jimmy Carter, Stacey Abrams and Hillary Clinton. Of course, sometimes that only reminds me of how little I contribute in this world which brings on negative thoughts again, so don't be like me.
Basically, I just want to say that you are probably doing better than you give yourself credit for, and that you can set aside your burdens from time to time because there are plenty of other people who are carrying the load.
One day, it's too much for you, and someone else does the heavy lifting. On another day, you might be the one to offer solace and support. Remember that you are a part of something bigger than yourself. You may feel small and ineffectual. But together, we are mighty.
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