Give your mind something to do... start some hobbies.. hang out with friends... the heart heals faster when there are other joys abound.
The last thing you want to do is be alone or at least not distracted by something (tv, hobbie.. etc)... This is just fuel to nurse the dying ember of your affections for her.
Just be kind to your heart and have fun for a while... learn something new... meet new people... and just go out and do some things you may have been wanting to do for a while.
If you keep wondering if you're over her or not... you'll never get over her... kind of similar to the idea --- if you watch a pot it'll never boil. Just don't worry about it.
"The weakest soul, knowing its own weakness, and believing this truth that strength can only be developed by effort and practice, will, thus believing, at once begin to exert itself, and, adding effort to effort, patience to patience, and strength to strength, will never cease to develop, and will at last grow divinely strong."
- James Allen