Remove the image from your wall, untag yourself if you are tagged, delete "friend" or anyone else who is giving you are hard time (if it really bothers you), and report image to facebook. This is not a C2 problem.
Or just go with it and laugh too. It is an amazing experience to rid yourself of shame. Unfortunately this is usually a function of age. The older you get, the less you care about what other people think, say, or do.