I'm sorry for your loss, I hope you and your family will be able to move on and make the best of life. As Smallhorses said, remember the good times, and the pain will fade away and the memories will help you in the future.
I've lost loved ones too, so I know the pain your feeling. My grandpa died 5 years ago of old age. We just talked about the good times we had with him, and how great of a man he was, and the pain of the loss went away. He still lives on inside of us.
R.I.P