Fuck i hit the back button on my mouse and lost what i typed
You seem to already have your own questions answered. It sucks, but it takes two for a relationship right. She has made it quite obvious that she is not as committed so i would think about moving on. Yes it is easier said then done..
1. Could be a number of things from insecure feelings to finding out that the love was more of an attraction. Its best to not bother dwelling on it as it does not help you move onto finding someone else.
2. Those results are still undergoing research and the scientists are out to lunch at the moment. This could also be due insecure feelings or Seeing how you react.. as if testing if you care.
3. Possibly to see if you are pissed off or not or trying to break the tension, could even be out of habit or boredom. Common occurrence to receive texts like that.
4. Thats the way i see it, damage has been done. Sometimes people will get back together if they were together awhile but in your case it was quite a short period of time so there is not much to hold you together ..
5. ...So you want the chocolate bar back

. It does depend on the person. Think about divorce. Some people keep the ring and sell it or they give it back as they want nothing to do with the other person.
6.

..Not quite sure how to answer that other then her planting the its not you its me bomb