Do you know what I think?
That you won't break up with her, even if the majority of the people in here tells you to do so.
I don't have enough information to judge on this, in fact, I believe noone does.
It's really up to you to keep an eye on her for like a week or two, If you think she's acting strange, or that she's not being honest with you, confront her with the facts, tell her that you're a little desperate, and maybe even a little unsure about the whole situation.
You know, after everything that's happened in my personal life, I'd break it up, for what I've read here, I think that's better.
But it's your life and your choice, really.