How to move on?

{Lol sorry for any grammar mistakes, I'm looking for advice so I typed fast.}

Idk if anyone is going to respond to this or even take the time to read it but I've been good friends with this guy since the first day of high school (both freshman and we both just moved here.) As the school year went along we talked and kept in touch despite us doing our own thing. Recently our true feelings about one another came out when I got out of my relationship with my ex. He told me he's always liked me but didn't want to stand in the way. I felt the same deep down. So, we started hanging out, and I met his family. Weeks pass by and my ex started rumors about me and now the whole school switched up on me. Even the guy I'm telling you about. He claimed he has varsity football he can't be surrounded by drama, which I can't. But, he hangs around the cause of the drama. My ex and his friends made my life hell, and he hangs out with them like I'm the bad guy. Since then, he blocked me when I went off on how wrong he was for his actions. At school, it's like I don't exists anymore. He tells his other friends that he doesn't have feelings for me but what I don't get is how you can stop loving someone that quickly. He told me he loved me, and I said he's too young to know what that was, plus too fast. He explained how he can't his love inside for the past 7 months. Keep in mind this was all 3 weeks ago that we were on good terms, now he doesn't want anything to do with me. I really like him, despite his actions bc he wasn't always a bad person. I just think he doesn't want to ruin his reputation bc of football but still. What's wrong is wrong.