You have tried to do all as possible to get she girlfriend to talk with you. You have been cordial, at least, in your opinion that is how you have come across to her. Have got tried to show her that you will never always talk about getting back together, as you suspect that would just drive her quitting you. And you would be right to imagine way. Still, it appears like your ex girlfriend just does not need to talk for right now. If that is the case and it does not matter what you do, is actually still acting as if she does not require to converse with you, then you maybe need take a look at that as an indication.