@Qwerty1234,
Oh, thanks for answering, QW.
Wellll - then I guess it's kinda standard advice re crushes. They're fun, and everyone gets 'em. Psst even us allegedly grown-up types still get 'em.
They can spice up your life in the sense that they can punctuate your fantasies. And I think that anything that helps us to be gentler and sweeter to our fellow humans is a good thing.
If you feel this person (I don't know what gender you both are) doesn't feel the same way, well, then perhaps it's best to start occupying your mind otherwise. I know that it takes a while. But focusing on just the object of the crush is of course not going to help it to become less intense.
This means school, sports, work, art, hobbies, anything else you can do and think about. Diversions, as it were. If you fill your life with other things, and your mind with other things, those things will start to crowd out the crush and the crush-y feelings. Not to say that you should avoid this person -- I don't think you should -- but to have other people and activities in your life. I spent a lot of angsty teenage years in love with this one or that one. Not that playing volleyball or painting would have removed the crushes from my head but they would have at least given me none crush-y time in my life. And then the crushes wouldn't have had as much power over me.
Of course your mileage may vary.