I can't stop wishing i was in the past?

So i'm almost finished with my first year of college. I went to a school that is two hours from home, and have met a lot of new great people, gotten decent grades, and have landed a really great job for this summer that i can use as an internship as well. But i still can't stop wishing i were back in high school, i had so much fun during that period of my life. Everyone says that they are so happy to be in college now blah blah but i would love to go back. And seeing all of the seniors graduating now is making me even more sad and feel even older. I should be happy with my life from the things that have happened but i'm not and i'm afraid that i'll always be reminiscing about those times for the rest of my life. Has this happened to anyone else?