Yorick, what a bizarre society French people would make if we were all throwing blunt things at each other's heads !
Seriously, I strongly think you should have a talk with your female friend to clarify the situation. Maybe she did hit on you at some point in her life when she was feeling bad for reasons you don't know, and she dearly regrets it today. Everybody is entitled to make mistakes, even emotional mistakes, now and again. And no relationship, however strong, goes forever without doubts creeping in sometimes. I haven't lived with the same guy for 15 years without knowing that. And by avoiding her, you don't allow for this momentary mistake to heal, and you cut yourself from two friends. Believe me, talk to her.
------------------
The world is my oyster !
And now I have the knives to open it ...