Selling Home

Just putting this out there to get some opinions.. please be kind. My ex fiancé and I are splitting, I own a home and he’s been living with me. He moved in with me in 2021 when I purchased the home. All bills were 50/50. He feels he should have a 50/50 split of the sale of the house. I told him I think 70/30 is fair since he didn’t contribute to the down payment. I think fair would be what he paid towards the mortgage and bills etc but I don’t think a 50/50 split of the sale of the house is fair. Appreciate any feedback