What do I tell her?

Then your best option is to tell her and lay it all out there.. Until you do that neither of you will be completely honest and know what the other wants. But if she is still not up front or doesn't change then you will have your answer...P.s. Nice nod to Doctor Who in your user name (off topic I know but I respect it )

Well it won't be much of a friendship if you continue to suffer in silence hoping for the relationship to take a romantic turn. You have to tell her exactly how you feel to find out for sure whether a serious relationship will ever materialize or not. The fact that she broke up with you, but continues to live with you makes me think that she's using you. Of course, that's just the impression I got, I obviously don't have all the details of the situation. But I think it's definitely confusing for her to decide she doesn't want to you, but she wants you to drive her to the club so she can get laid? That alone sounds extremely selfish and I don't think it would turn out well if you tried to pursue a serious relationship with this person. Bottom line, tell her how you feel. If she reciprocates great, if not then she needs to move home and let you have the space you need to move on. Good luck!

Is there another reason she may be staying at your place? Like is it closer to the club or does she not like where she is currently living? I really hate to say this but if she is showing no interest other then calling you her "wifey" she seems to be using you especially if you are taking her to the club and are not invited to go along. It may seem like a friendship to you but just from what I read its not on her side its a convenience for her and she knows you still have feeling for her which is why she is sending those mixed signals so that she can keep staying over and keep getting rides. Im not saying she is a bad person she may not even realize she is doing it. You should ask her in a nice way don't come at her like you are accusing but that you are confused and would like to date... but if she is unwilling to commit and wants things to continue the way they are don't seem like a good situation for you. Its not allowing you to move on and grow into the woman you can be so that you can get the kind of woman you deserve.

Well, she hasn't exactly been living with me. But I actually live pretty far away from the club, and I know she genuinely enjoys spending time with me. It is somewhat my fault as well, because she doesn't know how I feel because I've been keeping my distance emotionally because I don't want it to seem like I've been coming on to her. So, I don't think she knows how I feel.

Yeah, I think I will tell her. (And thank you. I was going to add 'and remember' at the end, but I didn't want it to be too long).