Just plain annoyed would be fine. The sooner they move to punching the less they have to actually talk, and the less they talk the less likely Thor is to wrench him away from his jealousy and rage. And he's been nursing those, tenderly.

But fine, fiiiine, he'll put on a face of suitable respect for generosity and hard lessons, for about two seconds. "Then I'm truly honored that you would choose to share this with me. Honored."