All I can say is, this is probably an infatuation.
Give yourself some years to cool it off first. Finish your poly and
NS. When you ORD, ask yourself if you are still attracted to
her.
Chances are that, you will have probably lost interest in older
women by then.
Everyone has his/her own infatuations when they are growing up. It
is all up to you on how you want to handle it, control it or let it
control you.
Your choice bah, remember, do not jeopardise her career or your
academic life in any sense. It is a lose-lose situation,
definitely.