First Day of School

I remember feeling excited about the first day of school. Both when I was a student and as a teacher the prospect of a new year and a new attitude made me feel hopeful. Today is Tyler's first day of school and while he is excited, I feel sad. I wish I had more time with him -- the summer passed far too quickly. I feel deflated because I am not experiencing a first day. I don't feel good about not teaching. I keep hoping I'll get a phone call from my old school asking me to come back because one of their teachers didn't show up or gave last minute notice. I don't really know what to do to feel better about the first day of school. Do I need to feel like this every year???