How do I treat my soon-to-be ex?

[NotReadyToQuit]

Well last night I went over to "her" house to fill out D papers. I tried to be upbeat and friendly, but she was very distant and almost annoyed with me. After a bit she seemed to warm up a little, but still distant. How can we be SO CLOSE for so long and all-of-a-sudden like strangers? This is what is so hard for me. How did she switch so quickly? I guess if she is that OK with me not in her life, then she isn't someone I want in mine. It's still hard though.