How to stop liking someone out of your league?

Ok there is this boy at my school I like. He is tall, attractive, and popular. For a while I just thought he was cute but recently I have become really interested in him. But I barely know him and he’s so out of my league. His Instagram is filled with pics of him and girls who look like pretty models. One of his friends, possibly girlfriend has 300k on instagram. I’m flat chested, normal size, and unconfident. How do I stop liking him. Keep in mind he’s in many of my classes. Should I try to talk to him or accept that it will never happen and get over it. Pls say which one and explain. Thanks