1. Not talking? it is called the slient treatment.
2. People tend not to talk because we are all lazy people who depends on the other person to make the first move. Instead of waiting for her to call you and talk to you, you should do the honor and bug her instead.
3. Think of relationship like full water cup that has a small hole at the bottom. When you guys do not talk, the water is leaking from the cup and will empty out. Your job is to do whatever necessary to fill that cup with more water. When the love dies out, might as well call it quits and find yourself another full cup of water. It might be easier that way than to try to fix things.