Please help me

There’s a really cute guy in my Spanish class. We have worked together twice in class and every time he walks into the classroom I feel like I want to scream because he is so cute. He’s chubby and shy and his voice is very deep so when he talks my stomach hurts because I want him to push me up against a wall.

I want to act cool around him so he doesn’t think I’m annoying, like I don’t want him to know that I’m interested. How do I do that???