To force him to move out you will have to evict him, that means giving him an eviction notice the whole ugly mess. I would contact a lawyer, many will give you a free consultation.

You could sell the house, get an apartment in your name, make sure you get all the paperwork done for letting him know he has to vacate the house on the date that the sale closes. Then if you don't ever let him move into your new apartment (not even let him in the front door for a moment) then you won't have to worry about evicting him because he was never a resident of your new apartment. It's a rather cold way to do things but might be the best option.