i like this kid

so there's this kid from my school, and i dont know why but i keep thinking about him all the time. like, he walks in the room and suddenly my heart beats super fast and my palms sweat. i feel weird cause we talk sometimes but its never anything big. i've been trying to figure out if it means something or if im just being silly. do people ever have feelings for someone they barely know? should i try talking to him more or am i making a mistake? please let me know what you think.