This is important point. For a while I was so upset that I could not cry during therapy. I had done so once, almost sobbing uncontrollably, and then I had felt I got better, like this was this special thing that made it all good again. But then I realized it was not so. So I tried to cry again but it wouldn't come. It took me a while to realize that I can still express pain, anger, hopelessness, without having to cry.

Cry when you feel like crying. Don't force it, it just adds pain on top of pain, makes you frustrated that you're unable to express yourself in this particular way.