Well, that's. Disturbing. Not because he was in the midst of this terrible yearning, himself, but the way it, whatever it is, if anything specific at all, can so easily damage someone who wasn't even there. How can such an emptiness be contained, or fought? It's the helplessness that troubles him most... and he hates seeing his friend reduced to such a state. Hates it. The loss of control is legitimately upsetting.

Finally, one of his long hands moves to rest on Xavier's back, mindful of startling him. Careful grounding is all he can think to offer. It would be nice if he could just know, like Charles always seems to know, but he has to ask: "What do you need?"