I too am sorry to hear of your family member's passing. I lost my aunt this past spring from cancer whom I kept in contact with almost daily via email and IMing. I think of her constantly.
Just remember that we are not robots nor un feeling human beings. Sometimes, the best laid plans run afoul.
I would encourage you though to journal since that is such a good way of airing your feelings, especially during times of grief. Nothing will replace them but I am sure that they will be happy to know that you miss them and they are in your thoughts and heart.
Take care, we are here for you, just give a shout and we'll answer
Let's lose together