HELP! NEW CLINGY ROOM MATE!

We as a couple had a small room nobody living in so we rented it out. Our new roommate is a young gay boy, he is very tidy and clean but has no sense of personal space whatsoever, and it drives me insane! He always comes out to the living room and inserts himself into whatever we do together or as a couple alone. He would go to the kitchen when I started cooking and start putting out his food, and start cooking as well, if I WFH he would come and sit there just next to me, sometimes starting a phone call or eating, as long as he heard I open my door or start doing something, he would come out just come right next to me, either start to talk or do things at the same time I do! I have no personal space and I tries to stay in my room, but he would call my name at least twice a day just to ask random questions! How also start buying what we buy, do what we do like I have a tail now and that tail won’t stop asking questions! I do not want to be mean or say something but it's so annoying, like I couldn't take it. Help!