Feeling disgusted that gay boyfriend watches ...?

We met on the internet, and I went to his city for a 6 month internship. I moved in with his family (he is not out yet, thats another problem.) But he as a large collection. I am not entirely against , hell, I watch it even from time to time. Though he watches it behind my back and would be too tired from his previous 'session' for . This concerns me because I feel it is damaging our life. I didn't mention anything, but now that I've moved back to my city, I feel a little disgusted that he would do that. I've sent him an e-mail explaining my feelings in a careful manner to see what he thinks. He responded to my e-mail saying that it is just to "satiate" his curiousity and that I am right in that suggesting when we are together that it is unnessesary. I told him that I do not expect him to stop watching it completely, because it is not realistic and would make me a hypocrite. After hearing this, I did not feel relief, and still feels scared to be close to him again. Why am I feeling this way? Is it because I feel that he breached my trust and have been secretive about it instead of being honest? I do not feel like msging him anymore and reluctant to show any intimacy, what is goign on? We talked tonight and he told me that he is sad that he has upsetted me. He feels stupid and wants us to talk about it. He said that hes willing to delete it if it really made me that uncomfortable but I didn't answer him. I believe this will remain a 'habit' whether I like it or not with it being especially hard now taht I've moved back home and in a long distance relationship. I just feel disgusted to some extent by the behaviour... I feel very confused as to what I should do. He texts and calls me everyday and I'm never in the mood to be intimate with him anymore. We used to be very close, but ever since this happen, I have just begun drifting apart... Everytime his text pops or phone pops up, I just feel reluctant. I still think about him all the time but it makes me upset everytime I think about him jerking it in the next room to while I'm in another room waiting for him to come to bed and sleep. Why am I feeling this way? I want to grow to accept this and move on, should I, and how can I?