What does she want from me?!?/1?

My girlfriend went through this period where she was really mean to me and kept saying things like "i want to be a "..."can we just hook up?...would you still hook up with me If i we weren't together"....after this she told me it was all a test and none of it was true....why would she even do that?...anyway, I told her that if she really wants to be able to be with other guys and me (like she said during the"tests") that I was ok with it and totally understood...she said "shh, I just want to be with you"...It is still hard for me to tell...In the back of my mind I always get the feeling that she wants to be with me...but others as well..How can I know for sure?