I don't know.
I can't think of another type that fits him besides INTj and I know what I am.
We understand each other so well in SO many ways... and no one else seems to get or appreciate or value my strengths the way he does.
But now that I think of it, we have had plenty of arguments (although mostly stemming from a problem with addiction that was severe)...
Also, sometimes I take out my frustration about other things by snapping at him (similar to what an ISTp just wrote about his ENFp wife doing). But I always realize my error right away and apologize.
And now this problem that keeps recurring (every several months) where I feel completely overlooked in the bedroom (I won't get anymore specific than that).
I am so sad today.