Why Do I Like Her?

Yes. I am a 15 year old boy. Last spring vacation (2017) a girl appeared. She was a friend of an acquaintance. I had never seen her before, even though she had lived in the same neighborhood for a long time. It took me a while to realize that I liked her. She started moving with our company. Although we are about 30 people in it and we are not exactly a company, but let's say that I saw it quite often. We didn't talk much. My problem is that I can't talk to girls and I always throw some nonsense trying to be funny. After a while, she found a boyfriend. Then I realized that she is everything I hate in our generation. She is also 2 years younger than me, but she is very developed for her age. She separated, reunited, she broke up with her boyfriend (who by the way is some sad fuckboy who spends their money on guchi and such nonsense) and constantly wrote things on instagram that they love each other, that they hate each other ... Abe in general children's things (not that I I am very big). But that's not all. She goes to hookah bars and those who have only children from 11 to 16 years. She's just making some dramas ... But I still like her. I do not know why. Despite all these things, I still feel something for her. When she's not around she's ok, but when she comes all my attention is on her. I am nothing more than an acquaintance to her. And I'm kind of glad that's the case. What to do? Why is that? I will be grateful if you help me. She goes to hookah bars and those who have only children from 11 to 16 years. She's just making some dramas ... But I still like her. I do not know why. Despite all these things, I still feel something for her. When she's not around she's ok, but when she comes all my attention is on her. I am nothing more than an acquaintance to her. And I'm kind of glad that's the case. What to do? Why is that? I will be grateful if you help me. She goes to hookah bars and those who have only children from 11 to 16 years. She's just making some dramas ... But I still like her. I do not know why. Despite all these things, I still feel something for her. When she's not around she's ok, but when she comes all my attention is on her. I am nothing more than an acquaintance to her. And I'm kind of glad that's the case. What to do? Why is that? I will be grateful if you help me.