I agree with the others and have seen similar. Best option is to leave things on a good note when you can. Otherwise, stay out of the way and let her figure it out.
The back and forth is the telltale part. Nice one minute and mean as a snake the next. Remember I mentioned early on she may try to come back? She likely has a strong pull to do that. But it wasn't very long ago that she mentioned you had your chance (which is nuts of course) remember?
This may very well just be a calm time before more storms. My guess is that it is.
Leave things on a positive note and leave it at that. Things are changing and it makes it hard to adjust to, but you do need to adjust.
For the record - I enjoy hearing about your other exploits and how things are going. But it seems that your reason to post here, if not about her, would be...awkward
How about posting both?
AJ
"Our lives begin to end the day we become silent about things that matter" MLK Put the glass down... "Yesterday I was clever so I wanted to change the world Today I am wise, so I am changing myself."