Over the past year, I have become fairly good friends with certain girl (we talk at least daily, online or in person, and discuss issues shared only with the closest of our friends). We share many common interests (both being nerdy math/science types) and, more importantly though less quantifiable, a similar way of thinking. I am a college freshman and she is now a high school senior, virtually certain to be admitted to and attend the college I am now attending (for reasons quite unconnected with me.) I have not thus far made any romantic efforts, partly out of cowardice and partly so as not to bias her choice of colleges.
However, as title indicates, I want to eventually, and this is where y’all come in. Complicating factors are the following:
-Our interactions are entirely marked by a feigned dislike of each other; feigned at least on my part, with good reasons to believe that the opposite is also true (the most obvious one being that she continues to associate with someone she apparantly despises). We can speak quite amiably on any number of subjects, but whenever the opportunity presents itself, cue insults. This makes it rather like a prisoner’s paradox; to make a unilateral effort would be risky. Hence the chemistry analogy in the title - the activation energy may be too high.
-While we were both in high school, someone, noting our closeness, asked her if I was her boyfriend. This, I think, startled her greatly; she insisted that I not speak to her in front of that person for some time. Similarly, when we attended the same summer program, she told me not to associate with her too often, so as to avoid suspicions that romantically involved. Certainly I can see justification for these claims; yet they indicate that, if not less interested in me, she is in posession of more self-control. Alternatively, they could be read to indicate that she is not interested in anything beyond friendship right now. It should be noted that these were very isolated incidents; once they had passed we were as good friends as ever.
So, my question to you is: what is the best way to approach this problem? I look forward to your insight.
Thanks for hearing me out, and any input will be more than welcome. (Apologies for the verbose, analytical prose; I’m rather reminded of this

) so I could be wrong.