Youngest Kid Starts High School

I'm depressed. My youngest kid just started high school. He's become so distant lately and I no longer know how to relate to him. Intellectually, I know this is part of the growing up process; growing up is growing away. I also know intellectualy that it's going to take awhile for both of us to land on a soft cushion with a new lining. But right now, in my gut, I feel as if I'm turning summersaults above the clouds with no view of the ocean below. Can anyone identify??