9 months is long term relationship.
What's in her mind is this: she is hesitating to stop this because she's young and hesitates to be single and have fun. You only live once.
You should give her as many space as possible. Don't call/text/fb her at all and don't talk to her friends. This is the best way to get her back if you want her back. The reason is: if you are mysterious and hard to get again, you will be attractive again.
There is also a possibility that she will end this because she really wants to live something different.