I'm sorry you have to go through this again so soon after things were starting to look up for you. I'm still leaning towards she is trying to let you down easy. Typically a woman wants to bond and connect more with a man as a relationship develops so the fact that she is pulling way makes me skeptical.
You have the right attitude of giving her all the space she needs and if she's not the one it's better to find out now. I think you're handling this very well!