My personal experience was that the girl and I stayed very close, but still got out and did other people. Then, when college was over, we got back together. Love is so much more than just being with a person. You should enjoy the times at college, but keep something secure that you can fall back on.
Perhaps this is why I've never understood the "we need to see other people" thing. Why can't you see (and sleep with) other people while still keeping the original person in your life?