On the brink of 18 (Letter to me)

Any parent with a teen I am sure can somewhat relate to this song.
This song came on the radio as I was cleaning my little girl's room and I just sat on the floor tears running down my face listening to this song.
My oldest is on the verge of turning 18. The moment I thought I had been waiting for all my life and now it is bittersweet. Amazing that he has come this far in life but still so far to go. They all think they know everything about the world at this age and it is so hard to step back and allow them to make their own mistakes when we too were once young and can predict ahead what will happen.
He never ceases to amaze me and I love him dearly.. After this song I picked up the phone just to hear his voice and he probably thought oh no mom is being sappy again.
Anyways this song just really touched a chord in me and moved me to tears and thought I have to share..