Just because you guys weren't destined to spend the rest of your lives together doesn't mean she shouldn't care about you any more. It's a maturity thing, when folks can be friends with their ex's. Of course, it tends to be easier for the person walking away from the relationship to want to be friends, than the person being walked away from.
And just because she cares about you doesn't mean she has to be your girlfriend.
She doesn't have to not care about you to not be your girlfriend.
Does that make sense? Heh. Good luck, go live your life, meet more people, make more friends. You've only just begun (queue music).
