Urgent prayer for my son

I need prayer for my son , who is 16. He is involved with the wrong crowd, and involved with a girl (18) who is deep into the vampire cult. Since he has met this girl his whole life has changed into this vampire stuff, and he has turned his back on God and is claiming to be an atheist. She has him believing that darkness is the way. Please pray that the Lord will turn him from this girl, this vampire way of life, and this group of wrong companions. Please pray that God will saturate my son's life with Christian peers, remove the ungodly influences from his life, but most important that he will turn back to the Lord. I cannot loose my son any more; please He needs your prayers. This has been going on to long, he needs a miracle now.