Two guesses: Reactive Attachment Disorder (RAD) or Borderline Personality Disorder (BPD)
I'd have to know more about his background. Please do not recommend putting him in a special/military school! That would be the worst idea. He needs long term therapy, his family's support, and love, not punishment.
http://www.focusonyourchild.com/rela.../A0000746.html
http://www.nimh.nih.gov/publicat/bpd.cfm