Never be that guy.
Besides, you've got nothing in common, and she's leading you on...
I agree that she sounds like she mostly enjoys male attention(though feel free to correct me) and that you might need to mentally sort some shit out first.
First off, does it really matter if she's interested in you?
Far be it from my place to talk, but it sounds like there are too many parts of her you actively dislike to truly like her, making it largely a nostalgic or physical attraction. I don't think anything good would happen if you guys ever actually got together(though, again, that's for you to figure out).
You might want to take some time and sort out your feelings towards her before the next time you hang out. If you realize that you aren't really interested in her, then you don't have to agonize about whether she likes you or not, which would probably make your friendship less confusing and tiring.
Moreover, it kinda sounds like she has some shit to work through too. Just leave the whole thing alone for a bit and see what happens, I guess.