So I sent her a message basically stating I understand her guilty feeling however I do not think there is anything to talk about if that OM is still in your life.... She sent back "is thaat yoour reaasoning foor making no effoort thiis laast moonth"?
If that's not some weird typo issue on your part, WTF? Is she actually mocking you here? Don't play this game. GAL. NC. Let her deal with the mess she's making. Be the best you you can be and let her feel what life is like without you.
