Why would you think that a friend who remained your friend and stood by your side while you went off on your own journey and discovered your own truths would be a “monster with a soft smile”? What has she done at any time to sabotage you on your journey of truth and enlightenment that makes you wonder if you should turn your back on her. Maybe it is she that should be turning her back on you? Has she? Has she turned away from you after you left her behind when you went off on your own?
It is OK to be different and yet still be the same. It is OK to share things and still keep things separate and private. You are both individuals and those things that make you so should be celebrated and respected. There are things that you will never see eye to eye on and you will have to agree to disagree. Those things might have to be taboo subjects for you and those things might eventually divide you and send you on your separate ways. But why not allow that to happen or not. You might be surprised that just the fact that what you discovered have made you so happy might have a profound affect on her and her life. OR it might not and you might just naturally drift apart a little more year by year as your interests and your priorities differ. Who knows? Why worry about it now, why not allow nature to take its course?