I have no idea ( just a vent???)

So i met this guy from my tuition class this year we didn’t really talk much until one day we started to talk to each other . We got to get closer , he was one of the weirdest guys i have ever met but we had fun together . As time progressed , i think i developed a crush on him but I didn’t realise it . But one day he started talking to another girl in the class and i felt mildly jealous . When he started to talk to the other girl i felt like i was being left out , he didn’t really talk to me anymore and whenever tried to talk to him , he wouldn’t really answer . I wondered if he ever really wanted to talk to me , like did he think i was too annoying that he didn’t want to talk to me anymore . I felt so frustrated at him because I didn’t know why he didnt want to talk to me anymore and we started to lose touch , our conversations were very short .After my tuition class had ended we didn’t talk at all after that . Sometimes i wonder if he ever thinks about me because most of the time I’m thinking about him . I haven’t told anyone about my feelings towards him because i dont really feel comfortable telling because most him them know him but i want to get it out of my chest. Sometimes i feel like i hate him because i feel heartbroken . Why did he suddenly stop talking to me when we were close ( btwI was never really close to other guys before).

He is still in my school so i could still see him but i didnt want to try to talk t him anymore . I’m not sure what to do anymore , i try not to see him in school so that i could move on . But the thing is its so hard , its been more than a month and i still can get over it .