I’m heartbroken💔

So my best friend and I weren’t completely dating but we’d already made it very clear to eachother that we had feelings. But sometime in December he just doesn’t answer me. Okay well it lasted a week. What would happen is he wouldn’t answer me, would talk for like 15 minutes and then leave again for like a week. First it was a week. Then it was three days. Then it was two BUT during that time, we were supposed to go to a movie together and instead he ditched me to go to a party WITHOUT telling me. The he didn’t answer me for 9 days. Then he said happy birthday to me once then ignored me for another 10. He was gonna play drums for a big audition I had and instead, he just ignored me. I was pretty upset when he did that and rightfully so. He got mad at me and called me insensitive for not understanding he’s busy and that he didn’t bail on me even though he did WITHOUT TELLING ME! He got mad at me and I eventually just apologized. I haven’t heard from him in over three weeks, no matter what I’ve texted him. We were planning to go to a school dance together and so eventually, I got fed up and asked one of my friends. We are going together and I still haven’t heard from Matthew. I’m heartbroken but he was at fault in this situation. Anyone wanna give me some advice on getting over him? In November he was like my DREAM guy. He was practically perfect. I just kept hoping everything would be the same. He might have even blocked my number at this point. I don’t even know and I shouldn’t care.