Well, that could mean a couple of things. ..
One: she was pregnant, decided that the relationship wasn't going to last, and decided to end the pregnancy
or Two: She was just testing you to see what you thought the long-term potential of the relationship was.
or Three: she was wanting to see if you mentioned marriage.
Either way, it doesn't sound like the two of you communicated well with each other. From your description, important things came up, but never got talked out fully.
It doesn't sound like there's much of a chance for this relationship to be put back together. Things weren't right for her for at least the last month. If you two had a huge fight, there would be a chance she'd cool down and come back, but that's not what happened here.
This sounds like she was thinking about if for a long time before she ended it. A person can easily keep up the hand holding,etc, while being unsure in their minds that they want to stay. It keeps things going while they are making up their mind.
I'm sorry she hurt you like this. When you are looking for your next love, find someone who can tell you exactly what is on her mind, and who you are comfortable talking with too. It sounds like part of what killed this relationship was things only being half-said.
I wish you all the best in finding someone who is more open and honest with you!