There are millions of studies that show that exercise is great for you in every way, but here's another one, specifically targeting depression symptoms.
Harvard Study
I recommend doing a few of
these videos. Just get up and do it, even if you don't feel like it and don't want to. If you, like me, can't do all the exercises because of bad knees, just keep moving.
There's a good collection of depression hotline numbers here.
Depression hotlines.
You can also call and speak to a pastor at
(800) 525-LOVE (5683).