Self-absorbed, self-centered, selfish...if you use it in a right way, it will help reduce pain. The pain that other people are constantly giving. Put yourself before others so that you won't hurt yourself and you won't give others permission to hurt you. Don't expect anything from anyone. Be independent. Don't set anyone as your priority. Don't create any memories with anyone. Don't try to befriend with people/human beings. They will never fail to fail you. Love/like/think/miss yourself more than anyone else. If you can obtain all of these, even though it does feel lonely, you will realize that you have less pain than before.
Be self-absorbed/self-centered/selfish I!