bf and porn

So I've always had a thing with my bf of almost 3 years watching porn. I just don't really like it. When I first found out he did masturbate to porn, I was not okay with it and he said he would stop. 3 months after he told me that, he I found out he never really stopped but I noticed that it never affected our sex life and how much we did it. I was fine after that & he's always told me I'm more importanr. Recently we were talking about it & he told me that he doesn't get horny off of porn, he just already wants to do it & uses it as a visual. I understood this & he also said that it doesn't mean he wants to do the girls he sees in porn, it's just a visual. Well, today I opened google & his account is still logged in to my laptop. I saw he looked up a specific porn star to get off to her. I don't know if what he was telling me is true. I would like to think she's just a visual but I'm not sure how I feel on him looking up a specific girl? I'm afraid to bring up this issue to him because he does get annoyed after a while because I've asked him so many times about it due to overthinking & anxiety. What do I do?