Why do they grow up so fast?

Yesterday my son comes home from school and asks if he can go to a movie this weekend with a girl!  He will be 13 in a little over a week and just started 8th grade.  I can not believe it's time for me to start worrying about him too.  I have been dealing with his older sisters and boys for so long that teenage boys were always the "enemy".  Now my son will be one of those!  I always knew he would grow up one day and start liking girls, but I suppose I was hoping that one day wouldn't come so soon.  He asked her to homecoming too!

Oh I am NOT ready for this.  I know what to say to girls.  I was a teenage girl once.  I had my heart broken.  This whole being on the boys side is going to be new to me.  Seeing the girl as the enemy when she breaks my son's heart will be something new.  Worrying about a whole new set of rules that go with having a son out there "dating" is going to be hard. I know the real dating is a couple years off, but this is the beginning.  I don't have brothers.  I don't have any memories or examples to reflect back on.  Oh Sam can help, but it's not the same.  He loves to joke around about things.  I am the serious one.  I am the one that has the heart to hearts.  Maybe I am overreacting.  I just wonder how my son will react when his heart is broken for the first time, or actually how I will react .  This is new territory for me. 

My baby.