TRIGGER WARNING: DEPRESSION AND SUICIDAL IDEATION. READ WITH CAUTION

I am depressed. I have depression. I have been for quite some time now, and I still don't know how to deal with it. I ask people who have 'overcome' this depression, and they all tell me relatively the same thing: "get through today and live for tomorrow" "fake it till you make it" or "it gets better."
But how do I live for tomorrow when I don't know how to live today?
What if I've faked it for too long that I'm just so damn exhausted?
When does it get better?

I can't take this for much longer.