I really understand what you are going through. I lost my job last October too.....I cried A LOT.
You feel rejected, unwanted, and especially insecure about getting a new job. Why would some one else want you, right? I felt this way anyways....
Your sadness may not pass for a long time. You are grieving. You have lost a part of your life.....and may not have had any control over it. It will hurt for a while. But it will get better. I still feel a sense of rejection, even now....but it's better. Don't force yourself to be happy for now, but you need to go on with your life and eventually you will start to feel ok and then eventually you will start to move on with a new life.
Everything will be OK. I know it's hard.....