What would you say?

What would you say to someone if you knew your time with them was short? I remember the summer before my son went off to college like it was yesterday. He was so ready for college. Let's face it, he was ready for college in elementary school. He has loved learning his whole life. He loves adventure and the idea of having so many choices for classes and meeting a wide variety of people from around the country and world excited him. I remember looking at him one day and thinking, I only have days left with him before he's gone. [...]