That is wonderful news!!!
I went to a small PacNW school (Seattle U) for undergraduate and it was a fantastic experience.
The students i have who usually do the best are the ones who didn't think they'd get there somehow (money, HS grades, scores, etc)... I have a feeling that you will flourish with the new challenges and the new groups of people you'll meet. Enjoy every second of it!
Your excitement is well-merited... what a new life you'll have...