Lyric discussion by Bexz0r 

Cover art for Will lyrics by Dresden Dolls, The

It sounds to me like she is talking about a person who she genuinely did love- one of those loves that dominates your life, until little else is left. She struggled to get it reciprocated, but he wasn't interested.

Now she is sleeping with him, in what is really just an opportunity to get laid with the male, but for her it is an explosion of sexual tension. By casually fucking him, she is trying to prove to herself that he means nothing to her.

"If only we could ride far enough, I'd forget you altogether"- Here is an example of this. She is literally trying to screw herself into oblivion. The bit about her mind going blank refers to the same intentions. (I don't mean to sound crude :P)

This is one of the most melancholy, tragic songs I've heard in a while. It's about being so passionate about a person who chooses to pointedly ignore you.

Absolutely beautiful.