Co-sleeping

Can someone tell me how to get my 4 year old back into his bed. We have been cosleeping since October 2022 and I can’t do it anymore I am so tired I never have room in my own bed it is exhausting. He has told his dad and me if we rearrange the room he’ll sleep in it so we do and he still won’t we have tired night lights new bed everything that he says to do and still he is in our bed. I can’t be the only one struggling right now with this.