People and their NC / games / power-play BS. See what that **** does? Confuses everyone, pisses them off, and makes them crazy; acting irrationally, and wondering in doubt... including YOU. This **** is no good. Of course, it was all the result of insecurity and uncertainty.
Certainly, breaking up isn't the worst thing to do, and quite possibly even necessary. But this was handled poorly, and drew everything out for NO REASON. Like you subconsciously wanted to see her suffer, have the "last word", come crawling back to you, or whatever. Of course, it all back-fired, and made you crazy and angry, too.
Lotta poor communication, distance, insecurity, uncertainty, assumptions, and immature "don't talk to me" nonsense going on throughout this whole situation. As well as battles for control, and seeing who can out-manipulate and -smart the other party. Everyone is confused and going crazy. "Is she cheating? Is he with someone else? What is she doing? Why won't he pick up? I'm done with her! It's cool if he's done with me. Wait, I'm not over her! WHAT IS GOING ON??!?"
Bad times. I used to be a crazy, insecure, immature jerkface loser, so I know all too well how this **** works - and what it does. It's certainly not "I'm the man; I have all the control; I don't need to be direct or responsive, ever... come chase me, and bow to my whim". It's more like, a mind-****ing drama fest where everyone hates each other, plays games, tries to out-manipulate and -control the other, and all the friends are taking sides, and no one knows WTF is going on. Very draining and a waste of time. Doesn't really get you no where, either.
The advice you have been given is also ****. Should've just communicated properly from the beginning of this situation. Could've still broken up, or whatever. Handle this **** like a man.