If a man's wife wants him to sleep in the same bed as her (I'm assuming you're asking him or are you just using mental telepathy, "he should know!") and he doesn't want to, something must have happened. He feels lonely around you, even though you're there he feels alone, something has seriously damaged the connection between the 2 of you.
Whenever he sees you, he is reminded that he is alone when he's with you. Something is making him feel like that. You tell me why would your husband feel alone when he's in the home with you, when he's sleeping next to you?
Do you make him feel like a man? Do you make him feel like a husband? Do you make him feel like a friend? or do you make him feel like a roommate?
When is the last time you told him that you really miss it when he sleeps next to you? That it makes you feel good to have sleeping next to you? Makes you feel more secure that he is lying next to you? That you feel lonely when he isn't in the bed with you?
Again, the mental telepathy thing, having those thoughts and saying them are 2 different things.
Make up something, tell him you had a bad dream the other night and you would really appreciate it if he would sleep in the bed with you one night just so you can feel more secure.