Why is he ignoring me?

So, there’s this guy I like. He would always say hi to me everyday and call my name when he sees me in the hallway and give hugs. Also he would keep giving me compliments and keep checking me out. He would massage my shoulders and tell me i look cute. I’d tell him that I thought he was cute too. It seemed that he was crazy about me. He’d put his arm around me and tell me that I am his. Some people thought that we had a thing like we were going out… One time we were throwing things at each other in a joking way and then suddenly he told me that he loved me and he told me to say it back to him. I told him no and I looked away smiling and he asked me why I was smiling so much. I thought it was strange when he said that. Then the next time he said that i hated him and i would tell him that i dont. He kept saying that for the next few days. So one day he looked at me and smiled but because i was so shy and nervous i looked away then he said that I hated him and i kept telling him no because that wasnt true. So during lunch me and him talked alone. He asked me why I hated him and i told him that i dont hate him i love him and he told me that i looked away and rolled my eyes at him and i tried to explain that i was so shy around him. I told him that i loved him again and he said that he forgives me. The next day this other guy who had a big crush on me kept following me. People thought I liked him. He would always go to my class just to see me. So we met up and my crush was there. He was like what are you doin flirting with my girl?? and ask me Is this your bf? I told him no. Then one day i got a new bf and my crush asked me about him. And ever since I noticed him flirting with this close friend of his in front of me. I was really jealous. Yesterday and today he did not talk to me for the whole day. He would just look at me and say nothing. Sometimes I would look at him and he would look away and pretend that he dont see me. He dont say hi anymore he completely ignored me. I just broke up with my bf today hoping that my crush would still be interested in me but now i think he likes that friend of his. Now I’m torn apart and heartbroken… Could it be that he is jealous or is it that he doesn’t like me anymore?? I mean I tried adding him on facebook but he just deactivated his account. Does he not care about me? Is it that he thinks I’m hooking up with other guys? What should I do? Should I ask him whats wrong and tell him im hurt??