Teenage heartbreak?

Ok, to start, i'm a 13 year old . At the begining of the school year, i met this new girl, I didn't really think of her much at first. She's really shy and I approched her first. We became friends quickly and i suddenly realized that she's extremely amazing then I realized that I was in love with her. Not the kind when youre like ' oh i like her' But the kind when your heart and soul are totally devoted to that person and you would do anything to make that person happy. So i told her that i was a , and she was fine with it. But then, there's this guy, who was my friend, who likes me and knew that i liked her, and so he got jealous, and told her that i was in love with her. so she kinda was freaking out but we remained friends for a couplw more weeks and I tried to impress her as much as i could, but then every time that i did, she was the only one who remained unimpressed. and after a while, she said that she didn't want to be friends anymore because i was too emotionally unstable. She then went on pretening that I didn't exist, like in english cl, we would usually be partners in projects, but now, she works alone. and she lookes so lonely and it breaks my heart. and every time i see her face, i feel like I have a gazillion stomach ulcers in my gut andmy heart is commiting suicide. I want to get back to being her friend. I don't care about anything else. i love her with all of my heart and soul.