I do know your loss. I lost my two sons and I can tell you that it will never leave your mind or heart. I still have things that belonged to them and every time I sit in my son's 68 Barracuda I can feel his presence. I made my other son's promise that the car would always belong to their brother but we would be charged with keeping it maintained and running for him. And then one of my other sons was murdered and his personal possessions were brought to me to keep for his young son some day. I often take the cover off his motorcyle and just stand there and look at it. I can see him sitting there and his smile and cocky look to his face. He and that bike were together every time we got to see him. Those visible items that I have are full of memories and I will never get rid of them or sell them. It would be like selling my sons. Sometimes a persons belongings is all you have left to remember them by. But I feel a person leaves a little of him or herself in material things. And if you can tune into that you can feel their presence.
Keep something that belonged to your daughter and hold it often. It will help you. I know it has helped me.
Sarge