Just have some questions to ask, is she still attached? I kind
of assumed that she wasn't anymore.
I guess she really is busy with work, give her some time to at
least balance her life first. 1yr may not have been enough time
after studying for so many years.
What matters really is that your feelings are true and sincere. I
would encourage you to give her a chance and continue to give
yourself a chance. I don't mean to ask her again now, but continue
to be around her and be part of her life. At least she won't forget
you, and you'll still be close to her and you can be there for her
when she needs you.
Don't take too long though, lest she really gets stuck with the
idea that you're a close friend and nothing else. Nothing wrong
with being a friend though, how many people can say they're still
friends with people they used to like, and close friends at that.
But would you be willing to accept if for the rest of your life you
two are friends and not something else.
If you tell her, you risk losing a friend you've had all these
years. I'm quite sure she'll be sad too to lose you as a
friend.
Ultimately it comes down to what you know about her, what you
anticipate her move to be and what you want for her and for
yourself. Whatever the decision is, I hope it's in the best
interests of everyone involved.