I'll summarise because this could be a very long story, if you need any specifics just ask. thanks in advance!

I'm in the same course as this girl in uni, we have.. a history I guess.. we used to hook up quite a bit without it leading anywhere back in secondary/high school (because we didn't want it to).

I've got to know her a lot more since starting uni and am beginning to like her, we have hooked up a number of times at uni parties and even at both mine and her place (by this i mean kiss close- I'm 100% she doesn't go further without a relationship).
anyway it just feels the same as before, going nowhere. Can I change this without messing things up? Or should I have already made steps towards changing how she sees it.

Thanks again

Probably time to invite her out to something romantic.