He is definitely lost. How? How could he be truly thinking about betraying Rome, the place he was raided, for a town of Cherusci that barely knows him?
But he is truly doing it, he thought, after killing the Roman soldiers that were with him. He does it not because of him... but because he knows he continues in love with you.
Not easy to forget you, if he is honest with himself. Before his father, the reik of the Cherusci gave him to the Roman Empire for peace, you were the only friend he had. He remembers well. You were the one giving him the only accessory he wore, his necklace with the wolf teeth you two hunt.
Maybe it is idiotic to think you waited for him all those years... but if he isn't wrong, you continue on the Cherusci land, just where you were. And maybe he will have you for himself. If he is lucky enough to prove that he is loyal to the barbarians, to his town.