I certainly hope tomarrow is better for you, and just trying to keep positive like you are doing is a good thing. Maybe you were just burnt out, perhaps it is the pred, I will be praying that some good sleep and some alone time will mend whatever is going on. Its good that people are trying to be supportive, and don't feel guilty, we all go through this, and this is something even I have gone through. Blocking people out completely, even those I love. Remember that those people love you and accept you completely, they will not hold this against you if they are true friends and loving family. During my hermit period as my best friend likes to call it, I rarely went out and when I did, I made sure it was late at night so I wouldn't run into anyone. My parents were worried so were all my friends, I also ignored door bells, knocks, phonecalls, emails, icq's you name it. I also felt bad because I knew everyone was just trying to help, but at the time there was nothing to help, I just wanted to be alone. I found out that when I came out of it, everyone was still there, happy to be my friend and love me for who I was and be supportive when I needed it and when I found the strength to ask for it. Just keep trying to stay positive and find those things that make you happy, maybe things you do alone for now. If your having a good day soon, maybe venture out a little, try a short walk or something that won't bring you into direct contact with people, just get you back out into the world, a small but important connnection back your life. I myself would go for a run, being a cross country runner I knew none of my friends could fall in beside me in case I did see someone I knew.
The excersize helped a lot for me, it helped to clear my head and get me thinking straight, and at the same time, It got me out of my house. Don't get me wrong it was a struggle to leave at first, I just didn't want to see anyone, but once I was doing what I loved, running, I forgot about everyone around me, and even waved at a couple friends on my run and didn't have a second thought about it. That was the beginning of recovery for me.
I also sought out therapy, which my therapist was a blessing for me, my depression stemmed from the image I had of myself and who I really was. Maybe you could consider that, but take it one day at a time, and at your own speed. You are in my prayers and I hope things get better very soon.