I think one thing that may not have been mentioned yet, and again no diagnosis from me here, just a suggestion to think about, is PTSD (Post Traumatic Stress Disorder). He is a Marine and has been in Iraq, if I read correctly. I don't know his whole history and don't know how long he has been this way so it's hard to say he has anything like Bipolar Disorder or Borderline Personality Disorder. In any event, he does not sound like he is not in a place to give you what you need at this time. It's good that he has someone that cares for him so much but please don't trust your inner self or put all you energy into being with this person at this point. Put you energy into trying to get him to see he may need help. I, suffering from a mood disorder myself, know how hard it is to be around someone as unbalanced as I can get and I also know how unreasonable I can be. Please post back if you need to talk or we can offer any advice. Good luck and be safe.