If your thinking about a guy does that mean he's thinking about you too?

Well you'll know if you are a boy, some guys are Very nervous or very brave. How do you know that he's been thinking about you, well if he has he would put a note in your locker, desk or if you have a job, somewhere that he knows you go everyday. If he doesn't like you he will NOT make eye contact he will not leave notes and he will talk about someone he likes. Do you go to school?