I feel like giving up

So I was seeing this guy for a while, something around 1 months and few days. And everything was great. He was respectful, had a nice job and he was studying at the same university. I thought we are committed - at least what he told me. But well, I saw him today when I was driving my car- he was kissing another girl and had flowers in one of his hands so I guess we were not. I’ve blocked him everywhere and I don’t plan to see him ever again. But I feel more depressed about finding somebody and I doubt it will ever happen. Before I was seeing that guy I was seeing seeing another guy- in short that dude was 29 years and he said that he had sex with 16 years old and it was normal and “men are attracted to fertility”. He also said that I am going to be pretty for 2-3 years and then I am gone (I was 23 years old when I was seeing him). I also blocked him everywhere because I didn’t want to be in a relationship with some pedo guy. I feel sick at this point. I don’t want to even try dating ever again.