yeah, in the end it's up to her.
She might have changed her mind about talking with you more than once until now. One second she might try to contact you and then go 180 and ignore you(since the moment she contacted you she showed vulnerability). Same goes for her feelings so you have to be prepared for both type of extreme reactions. She might talk to you and tell you something like how much he misses you and later on just plain ignore you for another week/month/year.
I agree, once you detach from each other, or they split you black etc. it is a very volatile situation, their emotions go from one extreme to the other so just be aware and ready for anything, don't get your hopes up for a reunion or having consistent contact, because she may end up cutting you off again, which could you hurt you, so just go into it with no expectations, no hopes, and once you get the right mind set, make the decision you feel is right, it's easy to follow your heart, but you have to think with your head.