He often forgets how fragile you are compared to him.

You are a strong sorcerer, heck, one of the strongest. Of course, you are not as strong as him, and he forgets that. You are vulnerable, fragile and sensitive to things he isn't, because of his infinity.

He has a cruel reminder of this, as he holds you into his big arms. You were hurt badly during a mission, and now he won't let you out of his sight.