I graduated May 2002 and I felt the same thing. All of my close friends were still in college and so was my boyfriend. I couldn't complain to anyone because they wouldn't understand (just like you said). Anyway, here's what I did. First, I attended several sorority events with my chapter (and really helped boost the alumni participation level doing so). Then I joined the Baltimore Alum chapter of Phi Sigma Sigma to remain active. By joining the alum chapter, I was able to speak with other Phi Sigs and get through the hump of not being in school anymore. Next thing you know, I am being asked to advise a chapter at a nearby college...so I became active again with my sorority, just a different chapter. Not being in college anymore was hard to deal with at first, but then after listening to people complain about exams and papers, I didn't miss it anymore. I landed a real job in my field and I started making really good money. Yeah, I couldn't go out all the time and hang out with people like I did while in school, but I was making money!!!
At first, it is really hard to deal with the fact that you are no longer part of the college scene. But I assure you, after the fall semester, you will get used to it. And if you still miss it THAT much, there's always grad school!!!!!