Found this on a forces website today:

Although he could not say with words the love he felt inside,

He treasured every moment and his heart would fill with pride,

He never said I love you but he came to every game,

Even in defeat his son knew he loved him just the same,

He'd pat him on the head Or maybe ruffle up his hair,

And tell him he was proud of him as long as he played fair,

When he graduated college I love you wasn't said,

He smiled as he shook his hand mumbling, well done my boy instead,

When his son went to war he trembled as he spoke,

And brushing away the tears he made a little joke,

Now, his son's come home and he stands with eyes downcast,

His hands stroking the coffin, saying I love you son at last.