Forgive and forget?

I had extreme feelings for this guy and I thought he liked me back. This wasn’t just me thinking he did; he told me, showed me, etc. I felt like a princess who just found her prince charming. We were like besties and so much more too! He had asked me out but I wanted to wait. Vice versa with me to him. As I waited for him; I was ready to let go until one day, he suddenly asked me out. I was so happy. I was just out of my freaking mind happy. And I thought we were going to last a long time. He was perfect in my eyes. Until this one night, he came out of nowhere and said we needed to talk. He told me he was sorry but that he thought we could just be close friends. And that he tried his hardest to like me but never could. I felt used; at a state of just wanting to cry and never stop. And he had the nerve to say he didn’t use me. After leading me on; saying he loved me; showing me the affection a boyfriend would show, and he says he didn’t use me? I finally came up with the decision to try and be his friend because he requested that we stay the way we used to be. He acts weird, says nothing, and is nothing like he usually is. I know he’s weirded out by this situation; but I’ve tried my absolute best and given him my all. While he’s done what? Apologized two times and mingle around with other girls?

Should I forgive and forget? Or should I literally just move on with Life, leaving people like him behind? And to the boys/men/lads/etc; Do guys really just act like this? Will I meet more of these? Or do you think it was a rare act of cruelness?

Thank you for your replies.