Ouch...

This is a tuffy. I think all you can do is just evaluate if you really want her in your life again. If you do, then accept her, try to start over. If you don't... I guess you should probably tell her that instead.

Try not to fear that whole "but what if she changes her mind?" thing. Before you make your decision, you should try to reach an independent state of mind, where if she did stop wanting you, it wouldn't matter. Just make sure you are comfortable enough with your own presence that nothing she could would hurt you, since getting hurt is what you probably want to avoid.

Could you go back without reliving the past? Could she? If so, and you love eachother, than I say go for it.

Peace.