The worst thing when you lose someone dear to you isn't the pain, the sadness, the river of tears, the sorrow, not even the feeling of absence of that person. The worst feeling is that feeling of emptiness when you get used to the roller-coaster of emotions. When you don't even feel sad anymore.
You just sit there, staring without seeing anything. Not even space is as empty as you feel. That feelings of emptiness and helplessness are like torture as you don't know what to do to get rid of it.
So stay strong, you are not the only one feeling like that.