exhausted.

I'm getting increasingly tired and it's eating up my day and my relationships. This is  the depression going into full throttle. I want to take tomorrow as a sick day, but i know there's a lot of work to be dome. Today I went to brunch with my friends/colleagues and they all mentioned how "out of it"I looked and seemed. I am sure they would understand if I took that day off for me. We're entering the high business season, lots of work must be done. I want some time to myself and save some money at the same time.
I take a lot of Valium with this depression cloud, but that makes me a bit sleepy. I suppose that I could use Xanax more as it will not stay in the system for a long period of time.
I'm so tired.
I want to die. How is this going to work? Who in my life would be a good source of support and try to make my lighter/happier?