sometimes its like push and pull thing
ive seen it happen a few times..and its really weird (not saying this happens in all cases)
lets say you're really good to your gf. your gf wont be as interested. then when you start to lose interest, your gf will start to want to be with you more or like you more
happened to a few different friends of mine.
being too clingy isnt good
you have to give them space and let them do their thing.
the more you try to hold onto someone, the further they'll distance themselves from you.
so i guess the best suggestion i would say is just enjoy your own life for now. do things you want to do (without crossing the line of course)..and see where it takes you.
by the way, stop thinking shes too good for you, because chance are, she isnt. even if she were, the way shes acting it out right now whether too good for you or not, maybe the most important thing is she isnt the right girl for you.