How do I stop feeling this dread?

I was dating this guy for a few months, and when on dates it was perfect, he was kind and yes we were sexual. He hadn’t talked to me in a few days so I reached out to him, and he ignored it. I broke down and assumed it was his way of breaking it off with me. I messaged him again a few days later and told him I didn’t want to get closer to someone that isn’t sure of what they want and that I need someone that is 100 percent sure they want to be with me. He said he thinks I’m amazing and that he’s happy we met, that he’s not fit for one hundred precent.I just thanked him for the honesty (deleted him on social media) and we haven’t talked since. And now I’m stuck crying everyday because I feel like I brought this upon my self. I live with this dread that it’s my fault and that I’ve lost the greatest man I’ve ever met. I know I deserve someone that without a doubt wants me, but I feel so devastated. Never felt this way before and I don’t understand what to do to make it go away. Did I mess up?