If you have no plans and she invites you somewhere that sounds fun, take her up on it. If there are too many times when she invites and you have no plans, it means that you need to start figuring out how to make more plans for yourself.
Is being in a deep relationship so very important to you now?
Why not just be a free man for a while? Is there a rush to fall in love?
I know you like this girl for some particular reason, but think about how empowering it is for your self esteem if you are the one to be the dumper. I'm not saying to dump her now, but if she retreats again, it may be time to say "Enough - I wont allow my feelings to be played like a yoyo".
Quote:
I'll need her to make a decision and I know that I'll have to be able to act and respond accordingly in order to force her hand
That "force her hand" quote gets you one 2x4 to the head and you have to go back 5 spaces.