I agree completely. Messala actually hints about their relationship when he says suggestively to Judah "Is there anything so sad as unrequited love?" In the 2nd meeting at Judah's home, Messala presses him for the names of the potentially rebellious Jews. He promises that if Judah helps him to quell the coming insurrection, Messala will be rewarded with a post in Rome, perhaps beside Caesar, and he will take Judah with him. Judah adamantly refuses. The friendship is ended and their love probably destroyed. Drusus will be taking Judah's place in Messala's life (and most likely in his bed).