"Ask me in a few weeks" means "shut up already," but said in a way that may actually end the inquisition instead of igniting an argument.
You cannot decide right now that you WILL ask him in 3 weeks, only that you will NOT ask for at least that long. You really need to shift it into neutral and stop pursuing.
Let's pretend. You have this house, and you need a little more income, so you decide to rent out your spare room. Now imagine the homeliest, most unattractive man your age that you know. Maybe that plumber with his crack showing. That is who you rented the room to.
He has use of the kitchen, the laundry, the common areas. You don't clean his room, you don't shop for him, cook for him, or anything. You would never go out with him, or even tell him where you were going.
No sex of course. If he tried to make a pass at you, you'd probably throw up a little in your mouth. Imagine this guy, preferrably a real person, whenever you bump into your H in the hall.
You don't need to purge the whole house of your H's things. But do remove all of his stuff from YOUR bedroom. Rearrange the furniture. Get a new bedspread or something to change the look of the room a bit. And start locking your bedroom door every night.
If this seems extreme, you need to realize that all of this is easily reversible, compared to buying a condo or even signing a lease on an apt.
