Ok so he needs to pack his things and go back to mom and dad’s. He can leaves a few items in a drawer. He can stay over 1-2 times per week. Let him know that you will be getting a roommate so the time he gets to come over will be limited. He has no problem using you so you have to set boundaries so that doesn’t happen anymore. I would be cautious moving forward with him. A man that can watch you struggle likely won’t make a good life partner.