Uh is it normal

like i have a crush on my cousin sister who lives in U.S amd she is 8¾(almost 9) years old and im 15½ years old. Is it okay to have like crush, she also said once over video call that she has a crush on me too, and i confessed it to her too, at that time we were busting out of laughter and were kinda shy(2024 march). But everyday, my day doesnt begins without thinking of her, theres not even a single day i have never thouht of her, after the day we met(2022, November 12). I love her, she also thinks me as her best cousin and crush and to some extent she loves me too, i could see. But its like i actually love her, and care for her, more than myself. I could end the whole world for her. She is so beautiful, that even a proficient englishmen cannot even describe. She is just more than oerfect i mean she complete from every aspects. And i dont have bad feelings for her, but as i dont have any siblings and all, literally all of my cousins(maternal, not paternal, we dont have connections with them) have their siblings. Except me. I love her, from that day, i want to meet her, that was the last day we met, and then she is in u.s where she was born. Everytime i watch her youtube video, i feel like, i wish i could be there too, to enjoy her childhood.