See, that's the thing: when you "friendzone" a girl, she won't let go of it. She'll try to get your attention and bring you to liking her more.
Women want what they can't have. You created a rarity by doing that. Chances are she'll want you even more.
So I don't think this is going to be a problem at all. Just play it cool, and subtly, but surely, shoot and score. If you can substitute the explanations by a kiss, even better. She'll like it even more.