Your adult can talk, caress the child he was, using the imagination.
Get close to that hurt, sensitive, fearful child and ask him what's wrong. Now you can understand him, kiss him, hug him, give him protection, support, love ... Do it, treat yourself as you would have liked to be treated in childhood. Give him love and understanding, hug him strong and tell him that from now on he will be safe, that you will take care of him and accept him as he deserves.