I would say first to be discerning about her intentions. If you feel that she is a good person the best advice I have is for you to relax and let go. Open your heart and live boldly and be honest with her about things you've been through to create a base of understanding. If you notice yourself in your head, take a deep breath and focus on relaxing the tissue and muscles surrounding your heart space and know that even if she breaks your heart, everything will be okay. Jump in.
