My best friend and I had been roommates all through college.
That's pretty nice. I'm in college, and I've had three different roommates so far, having to move three different times. Starting to get old. You truly lucked out!
We each just moved out on our own over the summer. I really miss living with her.
I hope you guys are able to keep in touch. With that kind of experience, it sounds like it could be a good friend for life. As we get older, we let those kinds of people slip through our fingers. Try to maintain it as best you can.