Girls and Everyone of the dating world Please read i really need your help/advice here.?

Hey there, McLovin here, 16 years old Im in need of some advice. There's this girl named Krista in both my History and Algebra 2 cl. She has the most amazing set of eyes i've ever seen. She's really pretty and im not so confident that a guy like me can get a girl like her. Im the caring type, who's kind, somewhat soft, will always be ther for ya, who'll be there when you need someone to talk to and when you need a hug and wants to be loved. Anyway, I think she's the same way. She has it all, good looks, personality, she's smart. I really like her a lot, and would love to be with her. Now here's the problems, i've never had a gf before, in fact never had my first kiss, never really touched a girl before. I know how to start conversation but not really how to keep it going. And im really scared because, i may get rejected and i fear rejection, and it would be really sketchy and awkward if she said no because we'd see each other everyday for the rest of the semester......