Get his attention. Talk to him, help him with studying, If your home is on the same direction as his then walking home together is also a good idea. Also if you have common interests/ hobbies you can do these together(going to the club, sports like jogging and Skateboarding anyting will do). But i really can't give much more advice as i don't know much about it. Good luck :)
then you just flirt back and see how it goes
depends if the principle likes you really I don't know
Does she make eye contact when you look at her? If you smile at her does she smile back? Talk to her. Will she engage in conversation with you? Is she flirtatious when you talk with her. If you can answer "yes" to these question, then it is a pretty safe bet she likes you.
Yes Jeff has a girlfriend. he really really likes her to. she really really likes him back.
you should just straight forwardly ask him if he likes you. but make sure the topic is appropriate. there's really no other way to get across to him knowing whether or not he likes you.
Yes. She thinks he likes her back but he still REALLY likes Clare.
That would be a pretty clear sign that he likes you.
he will flirt with you and give you signs that he likes you .. :D
Go out on a date.
ask him when your alone
You should ask him straight up if he likes you. Tell him how you feel.
You ask.