How do I let go??

Abigail

Me and this guy used to like each other and we weren’t dating officially but we had kissed and then we went to different boarding schools and kind of got more distant. In the first year, he still talked to me and I still really liked him. In the second year, a few of my friends were spamming him and being annoying apparently so he blocked me.

Him and my brother are still good friends so I still see him on holidays etc which is the best thing ever. However he’s had a collection of girlfriends and it’s really upsetting since I still like him. How do I let go and move on or is there a way that he will ever like me again?