Should I leave???

Karen

So I just got out of a toxic relationship not too long ago..his friend swept me off my feet n while I was single I worked on myself and fixed myself. Now ik my worth. This guy I was dating before was physically emotionally abusive(won't go into detail). The guy who swept me off my feet had some issues of his own (drugs) I had no problem with it but he stopped for me because he didn't want me around it. We moved in together. And he always tells me shit like if his ex hits him up blah blah blah. Well it made me happy n have trust in him. But I recently just found out that he has been saving (real girls around our area) photos. Naked photos stuff like that and masturbating to them. I don't have in issue with porn...but girls he use to talk to n shit..does that count as cheated? Should I leave? I'm like really hurt n idk what to do. My trust lost in him. N I told him I wanted a valid reason for what he did n he said I have a problem n idk how to stop it. Not to mention when I brought up who it was he lied about it n tried to hide it from me. That hurt even more for some reason. He deleted almost all the porn ppl he had on FB n deleted the 3 girls he saved pictures of. But I still don't know what to do..