I don't think any of us really gets over or past the greiving process, the worst for me is when my grandson comes round, he was 2 Monday. I have never picked him up or held him, I know I.ll never roll on the floor and play with him, teach him to swim or take him to disneyland, have special days out just me and him as I did with my Grandaughters.
Sometimes when his mom is playing on the floor with him or my wife is chasing him around I have to go to the back door for a smoke or I will breakdown in tears.