Summerdance and such

So, I went to Summerdance last night and learned zydeco dancing. That was a lot of fun, especially since one of my dance partners was real good. As usual when I hung out with her though I left the evening slightly confused, cause although shes seems to be warming up to me I still can't completely tell if she has any interest in anything more than really good friendship. Stuff like this is so confusing, and it isn't helped by the fact that everyone I meet is usually so busy that dating and stuff doesn't even cross their minds. I don't know if its because I've been single for so long or what but it really has been starting to bug me lately. I know I know wtf... everybody complains about this crap on here, but hear me out. I'm not really complaining so much as sending out a query for advice on how I should proceed. I mean in the past my luck has been very bad. The only females that showed any interest in me ultimately have been crazy up until now. Right now I'm at a point that I think a certain someone might have some interest but I really can't tell. A certain part of me wants to assume she doesn't simply based on the fact that she isn't nuts. Of course when I think that though I feel like complete crap because I know that I'm better than that. Also, in this situation the problem is compounded because from what I understand (through a mutual friend) this girl I am crushing on is just as oblivious as I usually am at picking up signals. As such I don't know how I could hint at her that I like her so that she can appropriately feel out the situation without being blatantly awkward about it. I mean she seems receptive when I invite her to things and dancing with her was wonderful, but I need to know how to step it up. Any Suggestions?

Additional: at least everything else in my life is going smoothly at this point.... turning 25 next week, got awesome friends, awesome job and life is sweet just gotta figure this other stuff out....