I feel like I should cry...but I can't?

My aunt died yesterday...and she was one of the best people I knew. She helped raise me and although we had a few minor arguments, we still were always close. I actually wouldn't even call them arguments...but anyways....I only cried once. For like, 2 seconds. I feel like, for how important she was to me I should be a crying, blubbering mess on the floor. And I'm just not. I'm walking, talking, laughing, eating...but not crying. I want to cry...I want to mourn her because she was one of my best friends. I feel like it seems like I don't care because I'm not crying and everyone else is. What's wrong with me? Why am I not crying over this?