how do people genuinely move on and forget about what happened after getting cheated on?

I was in a relationship with a guy I met in 2024 December, at first I thought he was nice and I didn't have any doubt about it until one day I got his password and found out how he used to save lustful vids of other girls and then I asked him if he watches corn or not he said he does and watched it 2 times when we were together and I was crying so much and decided to leave him but then he begged me to stay and that he'll change but after that day whenever I asked about it he told me he doesn't watch it anymore and that he changed and I couldn't believe him at all and whenever I would ask he lied to me constantly throughout the whole year. until today I found out he was actually cheating me the whole time we were together by lusting over other girls , he had a whole account full of sexual pics of girls saved and he in fact had boards about it as well and I seriously don't know how am I even feeling anymore I'm gonna confront him tonight and actually leave cause I seriously lost feelings after this but my hands were shaking so bad when I found out and my heart is still beating so fast even though I didn't cry because I didn't trust him before at all still I don't even know what type of grieve I'm feeling I'm just here yes I'll leave and never look back at him again but imagine how it feels knowing the whole time he was with me he was lusting over other girls without me knowing whenever I would ask him if he's watching corn again or if he's doing anything I would be upset with he lied to me that he didn't and fun part is he used to tell me how he hates liar, he used brag about how loyal he is, how he would constantly want to make me wear hijab and cover up even though I wear decent and normal clothes outside and told me it was only because he wanted me to be his wife and he was "preparing" me for it just to find out he was watching girls with no clothes on. He leaded me on all these time over almost 2 years and I seriously don't know what am I supposed to do after what just happened to me how am I supposed to forget about this and feel ever safe being with someone else again? I don't think it would even be possible anymore I feel so nauseous and anxious since I found out I couldn't cry I don't know what is going on with me i would be appreciated if people share me their story if they went through something similar and how did they overcome it and moved on with their life