Since you're an INTJ, maybe it would be better to look at the fault's of each type and see which one fits him better.
I'm not going to tell you which is which.
When he is "beside himself" or at his worst, which is he more like?
Select one grouping.
-having a gloomy view of a future
-suggesting impractical ideas
-acting impulsively, and changing things without any thought
-having intense negative feelings towards others (though these might not be expressed)
-displaying intense feelings towards others, or insisting on things being done -without any logical basis
-being very sensitive to criticism
-having a gloomy view of the future
-attributing unrealistic negative meaning to others actions or statements