I need some guy advice

I am 16, and in the 10th grade. There is a guy that I think is cute and I like, but I've never actually talked to him ever. I pass by him in the hallway and every time I see him I get butterflies in my stomach and I can't look at him because I'm so anxious that if I look back and he doesn't like me than I'll be that embarrassing girl who likes him. My friends say when we pass in the hallways he's always looking at me. I want him to talk to me, but I feel like if I don't acknowledge him or talk to him first he won't talk to me. My friends say he's probably shy and wants some kind of sign I'm into him, but I for some reason am very insecure and I can't bring myself to even look at him because I'm embarrased about myself. I know this sounds stupid because I'm making a big deal over a guy I haven't talked to, but I want to figure out how we can be friends in a less awkward way.