This question speaks to what I think is an across the board sentiment: As much as getting dumped sucks, usually dumping someone sucks more. Not always, but the stress and guilt of rejecting someone often feels more vile than being the recipient of a relationship pink slip.
I know your specific issue is different, you were never even together, but still, it's that awkward stress of disappointing someone over and over again.
It's like witnessing a puppy crying and scratching at the door trying to get back into the house. It's icky. My advice: keep your boundaries clear. Don't give her mixed messages or vague gestures that she can interpret in ways she wants to (spooning, holding hands, mud wrestling etc.). Tell her that you care for her deeply as a friend, but the romance side of things isn't something you want/will want. She might not be able to transition straight back into dude and dudette friendship right away. Your friendship might be on hold while she flushes out the lust vibe for you. In other words, maybe you need a bit of break from one another. Being a good friend is giving her time to do that.
As long as you are clear with your communication and allow her some space, you are doing the right thing. If you adhere to all that and you're still just too damn fly and awesome for her -- that's on her, not you.