i couldn't cry..Y?

Yesterday i received two sad news.

1. My friend's mother passed away. Arwah was also my parents' friend.
2. My friend is battling to stay alive at the hospital. She is diabetic and also now she has lung infections.

i could not cry, and i do not know why.

My colleagues who went with me to visit my friends, cried.

But i could not and it is definitely not me.

I would easily cry over anything .

What has happened to me?