I(20f) Feel Uncomfortable Visiting my Boyfriends(20m) House.

Me and my boyfriend have been dating for 6 months. I found out two weeks into the relationship that a week before we started talking, him and his ex broke up and she used to live with him at his house.

Since then when I visit the house, it doesnt seem welcoming. I still found multiple things of hers that he had to throw away a month into the relationship and he doesnt want to change or move anything. It feels like im walking into a house that still belongs to him and his ex. Ive tried adding little things of my own like pillows on his couch and adding food to the fridge but the house still is extremely uncomfortable to be in. What should i do?