Write it down. Look at the pictures, reminisce of times spent together & write it down in a sort of short story or collection of short stories. It helps to express what you are feeling into a little bit more detail & helps get it out of you. You don’t need to write a personal fact only narrative. Be creative & let the memories & photos guide your story. If you haven’t seen the movie Big Fish, I fully recommend watching it & getting an idea of how helpful creative story telling can be during the time of dealing with love & loss. When you feel like you have written enough, just put the journal away (or hide the text document in a computer folder that doesn’t get opened very much) & maybe when some time passes, you will discover the lost writings & read the stories you wrote that were inspired by your uncle & you’ll feel a sense of comfort & a little less sadness. My condolences to you & hope you find your way through this difficult time.