Look, it wasn't like there wasn't a part of Gabe that really appreciated the whole spectacle of William Beckett spread out on his floor, face lit with some sort of rapture, arcane babble spilling from his lips, body curving up off the floor like a bow being strung...
(Really, really, really appreciated.)
...but the majority of him, right now, was split between clinical monitoring of the situation, and worrying. He caught at the wrist William flailed in his direction, shuffled a little around to press his palm against William's forehead. He wanted to keep track of pulse and temperature - part of the point of this was that second-application Curse increased the heartrate and body heat, less than the first time round, but just right for the cultivation of antigens.
That probably didn't require him to wind up more holding William's hand than his wrist, nor saying, "Hey, I'm here, you're safe," but Gabe did it anyway.