I remember one of the other members telling you to just ignore the topic of the "dirty dancing". I think that's a good idea,but somehow this just doesn't feel as something that can be just swept under the rug and forgot about,at least for her. This is weird. A girl wanting to have a "serious talk" about dirty dancing. A serious talk about dancing! Wow. That in itself would be enough for me to just forget about dating her. If she's uncomfortable just dancing with you,I doubt she'd be comfortable in a sexual relationship. I mean,that's just plain common sense.
So you think if she were single,then she'd be interested in dating you. I suppose anything is possible,but if that's so,you'd think she'd show some interest,some signal of that in ten years. And if she did at some point show signs of interest,but you were as you say;"a wimp" about doing anything about it,then that just made things worse.
But like I said,I seem to be in the minority of guys telling you to move on and forget about her,and as well all know,the majority rules. That's fine. I'd just like to hear some of the suggestion everyone else has for you. that's number one. And number two,I want to hear the results after you've applied those suggestions. I freely admit,I DO NOT KNOW HOW TO GET OUT OF THE FRIENDZONE. I know how to avoid it in the first place,that's so easy,it's ridiculous. But getting out of it,nope,haven't figured that one out yet.
Anyway,be sure to let us know how the talk goes,and if you do get some suggestions of how to go about dating this girl,and you apply those suggestions,tell us how things turn out.