what does it mean when a guy gives a blank look?

[Water]

This guy used to be my close friend and I had helped him a lot in the past, but last month he betrayed me and disclosed my private message with a group of people and said bad things about me... we ended up our friendship and it was a painful ending for both of us.

unfortunately due to his mistake I am in trouble and he will be in trouble later, and I have no way to contact him ( we both did the same thing by cutting ways of communication, like facebook, email...etc).

our common friend had asked him to call me and he had given a blank look...

[Awsomist]

Looks like your friend has turned out to be the best ***#ole of the 21st century. Try to figure out a way to get yourself out of the mess.... and make sure you let the basta#rd suffer for his betrayal.
Even if you know that he's going to be in trouble later, then let it be. He deserves to be taught one hell of a lesson.

Sorry if I sound vengeful. But there is a saying.... Revenge is a dish best served cold.....

take care.