should i leave him

I am an emotional wreck right now. My boyfriend of two years watched porn to jerk off before we started dating. He claimed for almost a year that he didn’t use it anymore because he had pictures of me and would think of us. Now I just got him to admit that he still watches it and I feel stupid for believing him and disgusting for letting him touch me. I’m not mad about the porn particularly. I’m mad because he got me to believe that he didn’t need it anymore and made me believe he wasn’t like other guys. I don’t know what to do someone help!