I like the most popular guy in my class, I'm a freshman and I'm kinda popular, but we talk all the time at school and he always looks at me. What should i do?
You should flirt with him more. If you already do flirt with him, then what you need to do is make it a bit more "forward". As in try to touch him by "accident" or make a more suggestive joke. But nothing too forward or else it'll scare him away.
Either that or become better friends with him. Relationships can start out from a friendship - they often do actually. So you can try to strengthen your friendship. Maybe suggest to hang out, but only as friends. From this, you'll be on your way to becoming good friends.
There are, of course, problems with both approaches. With the flirty approach, there is always the risk that he will actually draw back once he notices. He might get "scared" and try to avoid you or make minimal contact with you. With the friend one, there is a high risk of being friend zoned and never considered to be a potential lover...like ever! They are both equally worse. The flirty one can get you somewhat rejected while the friend one can get you friend zoned.
Getting friend zoned doesn't seem so bad at first, but trust me, it feels terrible. Sometimes it's so bad that you'd rather be rejected than be friend zoned. Being friend zoned is really annoying too because they think that you're their friend so they're casually around you and their presence keeps reminding you how you can't have them! Whereas after being rejected, you both are awkward with each other, you stay away from each other, and thus you are able to move on.
But enough about the rejected and friend zone. Make a plan about what you will do and say if you aren't the compulsive type. I'm pretty compulsive so I rarely do this, but if I want to get things just right, I do occasionally plan it out and think about it.
Main point: Strengthen your relationship with him somehow. Whether you're flirting more or building a friendship with him, it's important he knows that you are interested in him somehow. I wish you luck!