help asap!!!😭😭🤧💔😔😔😔

So me and this boy have been talking for a while but something happened this week 😭🤧💔. So on Wednesday I found out he's dating this girl from another town, I cried and the teacher saw me crying and sent me to the office for 2 1/2 hours crying talking about this. But I had him in 7th period and it's weird because like I was crying about him and he still seems the same ya know? So I thought, maybe it's all a lie... . I went home and got ready for my All Star Cheerleading practice then go to photoshoots because I'm a (pre. Pract) modeling. So I thought all during the practice about it. As I came back home, I checked his instagram page and he haves a heart on his bio, and I check his girlfriends and... so does she. I cried in tears all night and cried myself to sleep. Yesterday I cried again in school and my friend said "Karina, I know you're gonna be mad at me and be very upset but... they've been dating for a month" omg you have no idea because me and him were talking and this happened for a month? So I was very upset and angry. But then someone told me " he didn't want anyone to know because he didn't know what he wanted" I thought maybe he did and he picked her. But I didn't want to think about it. And the last period class, I cried again. As I came back to class he just deep stared at me but my hair covered my face and didn't see my face but he looked at me when I was sitting down because I sit one person behind him. So later that day he had a basketball game, I was sitting with high schoolers and talking to them. But when he came out to play he couldn't stop looking at me, but he was mad because he saw me with this one boy he hated because of what happened between him and that other boy not long ago. But then I went home like nothing happened. Then today, at lunch my friend said that he couldn't stop looking at me at all. And during 7th I tried not to cry and I had a jacket with me and put it on my face. I'll see him looking at me and if my face is up he'll talk to my other friend and look at me and turn to me and talk to me and I'll just look away and put my face on the jacket. The bell rang and we went out to the front to get picked up. I was sad I started crying. I told my friend "I see him so happy and he's happy to be with that girl and it's sad I'm not her" and she looked at me and she said "Karina he isn't happy look at him" but I didn't I just hugged my friend. And then that's when he saw me hugging her looking like I was sad. So I sat down with my other friends and he was standing in front of us and I was upset and pissed you could see my face. But my mom came and me and my friend left. Later on I went to Whataburger to go eat and he sends me a snap and same as usual, his face, and I sent one back. And he said "you good?" And I said "idk anymore" then he said "what's up?" And I said "I should not say anything about it" and he said "I won't tell anyone and you don't have to if you don't want to" and I said "well, it's about you, but it's not important" but then he said "what did I do?" And I said "it's not important. I think I kinda made him mad about not telling him. But a hour later he went with his friend and his friends girlfriend and him and his friends girlfriends are from the same place and I bet they are allll together at the movies. I'm strongly upset. My mom said that he doesn't want her, he doesn't know who to choose. He's just confused but he doesn't want her, I know he wants you. And I did tell him a few months a ago but maybe he was waiting for me to ask him out and he was scared to and that his girlfriend asked him out that's why he's dating her. But idk I need advice how to do this because Idk. 😭🤧💔💔💔🙄💣