There is a little thing called "fate"
If it is your fate, to get back together with this girl, then you will. In the meantime, I wouldn't get too love sick. Carry on with life, enjoy being single, do some things that you couldn't do if you were in a relationship. Enjoy some "ME TIME"
I know that it can be hard, after all we've all been in a similar situation. Just occupy yourself and do somethings that you enjoy, all the while working on your feelings and trying to figure out why/if you really truly love this girl, or if you just miss her.
Blessings :)