In my view, you're coming off very manipulative here. Sure, he hired an escort to hurt you....because he was hurting. You gave him the ultimatum of "I get to explore things with Christina or it's over." That's really fucked up. He probably felt that if he said that he wasn't okay with you seeing Christina then you'd dump him...it definitely reads like that with you already bringing that up. He seems like a regular, insecure guy that got fucked over emotionally by a female and now you are looking for people to tell you that it's okay to dump him for being psycho. He's not. You're manipulative and emotionally abusive. Let this poor man be. You've played enough games.