Unhappy love visits almost every person who can love. If you are no exception and you have just such a period now, then you should think about whether you need these strong, but negative emotions, whether you want to continue to experience such feelings and suffer.
If you are still a schoolgirl, and the object of sighing studies at the same educational institution as you, this certainly adds complexity. However, there is a way out of any situation, it is not for nothing that they say: "Out of sight - out of mind." But don't rush to leave school.
Talk
First, look at your unrequited feeling as a disease. This will help to include at least some common sense. If you are able to trust someone at the moment and allow them to give you advice, then talk to a psychologist. Better to let it be not a school specialist, but a private paid practicing psychologist. He is able to convey to you some techniques that will help you realize that the existence of your couple is impossible.
Let go
Let go of your chosen one. Mentally wish him happiness and good luck in life without you. This is not difficult to do, you just have to try.
Transform
And in order to amuse your self-esteem and make your life happier, brighter and more pleasant, pay attention to yourself. Change your hairstyle, change your style, change your behavior and manners. You must internally adjust yourself to the fact that you are higher than him, and he is not worthy to be next to such a girl. You are the queen, and he is a subject and also not the best. This kind of psychological training is quite effective. Plus, maybe your new look will appeal to another nice guy who will also be nice to you. It would just be the perfect solution to your problem.
If there is no desire to start new relationships, then you can just come up with some kind of hobby for yourself: dancing, traveling, reading, drawing, handicrafts, learning foreign languages.