Nerd, one thing I feel that needs to be said since you might move from your ex:
Do not date a girl to replace her. I know when I first broke up with my ex of 1.5 years, I wasn't ready to move on, and so as a result I tried replacing her. In the end, it resulted in bad relationships, and I got hurt more-so.
Luckily, my current girlfriend is a real sweetheart and she loves hearing all my stories, so I don't really worry about it anymore, but really you should move on without trying to fill any "void." It just doesn't work.
Also, don't try and get her back anytime soon. She sounds like my ex, and she still tells me she loves me. Just not enough to date me. So if you ask her out and she's like my ex, you'll probably end up hurt.
Best wishes