Guns, Dogs and Blades QnA
I'd be nice to him, pet him, 'good boy, but you've got to go home, let's go' and 'dad stern talk' him home. You'll have to do it a while, but he'll grow out of it. Meanwhile, sort of enjoy him without the responsibility or expense of ownership.
YMMV, as I have two dogs, and have to talk myself out of more...