But you're with him, and she's history. Stop making such a big thing of this. You're making him say her name even more. Ignore the whole thing. Or let him go to a hypnotist.
Hypnosis often works really well to help people get old relationships off their mind.
Be happy with his pet names for you. There's nothing wrong with being called honey or sweetie or any other term of endearment. Get back to basics. Let him know your good sex relationship is more important than him saying her name. By taking the pressure off, you'll help this situation to go away.