I decided that if I'm going to have a relationship with this woman it's going to be a friendship.
To me honest you cannot be friends with a PoA until there is no longer any limmerence (romance). Being friends is just an excuse to stay in touch with her and it only prolongs the addiction. It will turn you into a Torchbearer who suffers even longer than love addicts. Get her out of your life and out of your head at all costs. Check out the book, Falling Out of Love. It might help. Remember that you are not in love, you are projecting your unmet needs on to this person. As Robin Norwood said, healthy love does not hurt it fulfills you.