What do I do?

I am exactly like you! I am also a very shy person but I'm gonna share with you the tricks and knacks I've learned on how to just get over it.

First of all, you know that he knows but the worst thing you can do is to just stop talking to him. You say you wanna talk to him, so, as much as you don't want to see this, just talk to him. Not about the fact that you like him but just about random stuff. Be yourself, get to know what he likes and see if you two have things in common.

The best way you can start by talking to him is to casually say hi at school and if he's in any of your classes just ask an how are you? And you don't have to say anymore than that. That way you seem open and friendly. If your too shy to say hi, try to smile. A casual smile. Guys go for girls who seem friendly no matter what you look like (although I bet your very beautiful duh). The fact is because your acting kinda cold, it sends a wrong vibe to him. You shouldn't be ashamed that he knows. It might actually be flattering to him ;)

You need confidence too. A great way to get started with that is by making sure you have great friends who support you and make you laugh and feel good. Hold your chin up, even if he don't like you now, doesn't mean he won't in the futur. Ask your friends to accompany you to ask him to chill with a group, great way to get to know someone! Your with your friends so you feel confident, and it makes things less awkward. Just as long as you start by being friends and don't get your hopes too too up cuz there are a lot of fish in the sea and your still a freshman so girl, you got plenty of time!