What causes us to dance when there is no music?

Dude, I thought someone else danced to no music...

I think the way you've placed her up on this pedestal is very unappealing. It's not like she's the be all and end all of relationships. Besides, it’s too much pressure for her.
It seems as if you probably screwed yourself becoming friends with her. Now she can use that excuse to stray from the suggestion of a relationship. Damn her! Well, what's more important to you? Preserving a friendship that will:

a) further your relationship and possibly open the gates to a romantic one
b) cause her to see you as a friend and only as a friend.

or pursuing a relationship that will:

a) probably end and you guys will try to keep the friendship together but it’s just too much damn baggage to carry around
b) probably never happen because the friendship label has already been established.

So yea, it’s pretty much up to what you want to salvage. As for suggestions... Don't waste time and contemplate "Should I... or should I not...?" You should tell her how you feel, that is, if you actually do feel that strongly for her. But talk to her as a person, not some kind of trophy that will finally bring you happiness.

Jam it back in, in the dark.

Preserving a friendship or pursuing a relationship was the option, “a)” and “b)” were just possible outcomes. I apologize if that wasn’t clear.

It seems like she’s already preoccupied with her current relationship. Any further attempts to initiate a new one and she will probably resent you for being so persistent. I know you don’t want to hear it but just cool it and move on, at least right now. If she already knows how you feel and won’t reciprocate then she’s probably not interested, or ready, to be in a relationship with you. And don’t let her monopolize your thoughts simply because not much else can get done if your head is too preoccupied. Time will continue to progress whether or not you choose to acknowledge it.

There's nowhere I can't reach.