Anxiety driven RAD

My RAD baby boy is anxiety driven, picking his skin until bleeding, hitting his head and obsessively calling out you-ee you-ee you-ee. I found another feces filled diaper under his dresser this morning where he was on a time out after hitting his sister.  He can't take my affection for more than a few seconds, that RAD creeping up and covering his heart. I hug him and kiss his cheek and all of a sudden I feel a tenseness and he sticks his face in mine or pulls my hair or says "you stink'; all intended to push me away.