What if your crush founds out you like him and then he doesn't talk to you anymore because of that?

He's being immature by ignoring you and you probably should move on- if he acts like this then there's no way you should want to eventually be in a relationship with him. Give him some space though, he might mature a little and realize that he likes you. If not, no big deal. You'll find someone even better. Hope that helps! :)