Of the moment.

• Today was the last time I wore my green uniform.
• Good bye to my trusty black leather shoes;
  • Thank you for being comfortable.
  • I am sorry I never cleaned you.
• Good bye to the very last moments of high school normalcy.
• Today, I can say that the four years have been good.
• Today, I can say I'm looking forward to the rest of my life.

Edit:

• Today, I realized how different my life is going to be.