Sorry mutatio, that level of silent treatment would be difficult for anyone to deal with. I agree with Azzork though, this has more to do with her than you so keep on the path and be the man you want to be. It may be that she is trying to get you to react in a negative way and you continuing to be pleasant really is causing her conflict. Don't overthink it though, it could be that's she just dealing with something about herself.
Accept what is, let go of what was, and have faith in what will be
