It is best to let your intentions be known now.
Do understand that this girl has rejected you once before and that she has not truly shown any convincing signs of romantic interest thereafter.
She may have said what she did when the both of you were on LSD, but, the both of you were on LSD. She was not exactly clearheaded at the time.
However, if you still feel that you want another chance at this girl, it is best that you let your intentions be known now.
You have to get her out of that friendship mindset.
You should have never allowed the friendship relationship to get as far as it did before finally letting her know how you felt about her.
But you did.
Now, she has you in the friendship category in her mind and it will be incredibly difficult to get yourself out of it.
You have also not done yourself any favors by building her up to such a fantastical level in your mind.
Again, if you still feel the need to try again with this girl, let your intentions be known now.
The longer you wait, the more you will make her out to be a lot more than what she really is in your mind.
This will make it that much harder for you to make your intentions known because you would have raised the stakes to an impossibly high level.