First off,

CONGRATULATIONS!!!!
It can be bitter sweet. It's so hard to say goodbye to friends and the people you have been seeing every day for so long. It's nice if you can keep in touch or are in the same town so that you'll see them; but that's not always possible. I went away to school right after graduation. The loss is never easy. It has helped me with the passage of time, to get involved in new things, and to meet new people.
What are your plans now that you're a Graduate?