I got into some creative rituals to process it, like looking over items that were left from him on cozy Sundays and remembering all the things he taught me, going to places I knew he would have loved to visit as well and thinking about him, writing letters to him (I never wrote real letters to him alive), talking to our old friends about him and reaching out to some people I did not even know personally but I knew they admired him, talking to my own friends about the many positive influences he had on me, etc etc. It was ongoing ~for two years after his death. I was idealizing him during that period more than ever but it helped me. I remember him in a much more realistic/objective way now and no longer feel a need for the rituals but it really helped for a while.