Why do I like this guy so much

Like I just met this guy in a play that I played in, he is nice, cute and I love his personality. In time we got closer and closer and it was fun (he is an 18 year old, while I am 15, ik it sounds pedoish but it's not) I love his vibe whenever we talk and I love the fact that he talked to me a lot when I wasn't comfortable around him or the other actors in the play. I loved the fact that he tried to find something in me when I just push a lot of people away. I absolutely loved it. He isn't conventionally attractive that's what I like about him. His skinny frame his wierd ass face, his nose, his haircut that he would die if it gets wet, all pull me towards him. I can't like why do I love him. It's like some spell was casted on me to fall deeply in love with him. I aspecially love the way he talks, his smooth voice, I just adore it. I love it when he looks at me with his wierd big eyes, that this especially gets me. I am obsessed with this guy, and like I only fell in love with him a day ago. The problem is he's a fourth year and he's graduating highschool while I just started highschool, soo yehh and alsoo like I have no way of contacting him after the pleys, rehearsals and performances. I don't know what to do I love this feeling it keeps me up at night, all I do is think about him I can't think logically around him, and he also ignores my messages which is like Okey :/ I honestly wish I haven't met him but ig thats life,

So basically what should I do?