I'm a 19-year-old female, and he is an 18-year-old male.

Hello, there's this guy I’m friendly with, but I need to share something. A few days ago, he mentioned that he used to have feelings for me, although he doesn't remember when or what year. I can't shake the feeling that it might have been more recent, but I don’t want to bombard him with questions. Here's the kicker: about a year ago, he actually blocked me after I told him I liked him back in high school. I’m really confused about his actions. If anyone, especially guys, could offer some insight, I’d really appreciate it. I just want to understand his perspective.