You can only speculate what's he's thinking... there could be some pretty heavy Cain and Abel action going down. If he can't be more expressive about how he feels, what can you do? He may not even realize exactly what he is feeling. The situation is emotionally complex and playing out in short order; how can you be sure of your own feelings? Let things settle out, don't demand any immediate answers or solutions and re-engage in the situation, if you must, after some time away. Adapt, improvise, medicate, overcome, and repeat, though not necessarily in that order.