addressing - ambiguous as the father could be telling the son a memory of him or he could be thinking about the memory to himself
the focus is on how the father thinks of the son all the time, poem is from the fathers perspective on how he felt when he saw his son moving on
the poem is a memory told by the father, about his son eighteen years ago playing a game of football. The father is hurt by how his son is moving on as the son left his father to go ahead to his friends. The father knows his child has to move on but it's painful for him to watch.