Breaking point

Hi everyone, this is my second post about the same guy i’ve been dating for almost a year now, living together for a few months now. I looked through everything in his phone and found nothing shocking until i decided to look into his files (downloads and everything yk) and found hundreds of photos of his ex modified by ai to reveal her boobs, also old nudes and oh my god ai edited photos of people i know, even a friend. This is disgusting and i want to throw up, how do i break up with him. please help i don’t know what to tell him and how to, how can he do this to me i feel so lost, all of these files were made while we were together. this guy does not love me