I just found out that my boyfriend saves sexy photos of random girls online. He says that his friend sent him the folder and it automatically got saved when he clicked it yet it is hidden in his phone. He also told me that he didnt look at those pics but i highly doubt. Now j kinda figured out that he kept on installing and uninstalling this certain app where his "friend" sends him the photos and videos. I dont know what to do and feel. He said he already deleted the photos and it was not there when i checked so i believe him. He also said sorry and that he admitting his mistakes and wont do it again but im anxious. Any help or advice?

Edit: it's almost 6 in the morning here and i haven't slept a wink since last night just thinking of this