shame

My boyfriend came clean to me that he had been watching porn during our entire one year relationship, he had only told me because he went through my phone and saw i liked a video saying porn is cheating. He kept apologizing and asking if im mad, i asked him when was the last time he said one day ago. Ive never been so disgusted and disappointed looking at him through the mirror, i cant shake that feeling. We are sexually active so i was so surprised i wasn’t fulfilling enough. since then he promised he would quit but i dont believe him, i cant help but wonder what he truly does alone without me. I try to ask but he becomes defensive and shuts me out, buried in shame. I want this to work out, but he’s driving me farther away without doing a single thing.