When my ex broke up with me, he started calling again after a week. At first it was only once a week, and then twice, and then every day, but each time it was just talking about general stuff. After four weeks he finally called me at midnight one night, after having just spent the entire day with me and mutual friends, and we talked for three hours, during which he said how much he missed me and other mushy stuff. You gotta give it time, and if it's going to happen at all, it will. Just don't push it.

I earned the nickname "Ice" from my best friend during the entire ordeal, because I was pleasant and didn't bring up the relationship a single time.