I am so sorry. I know you're going to miss him. I have a way that I keep my lost loved ones close. I have a notebook that I write down the memories as I recall them. There are things you think you'll never forget, but I like to write about them anyhow, just to be sure they're always reachable. I've shared so many stories with my grandkids and the greats too, which I might have forgotten if they weren't written in a notepad.
Just a thought.
Condolences just seem so insufficient.
I think this says it beautifully.
Do not stand at my grave and weep I am not there. I do not sleep. I am a thousand winds that blow. I am the diamond glints on snow. I am the sunlight on ripened grain. I am the gentle autumn rain. When you awaken in the morning's hush I am the swift uplifting rush Of quiet birds in circled flight. I am the soft stars that shine at night. Do not stand at my grave and cry; I am not there. I did not die.