When you can't seem to think about anything but one special person, you probably have a crush on them. Sometimes crushes come on quickly, love-at-first-sight style. Other times, crushes sneak up on you, turning a good friend into the object of your affection seemingly overnight. Crushes make you smile for no reason, daydream relentlessly, and feel extra motivated to go to school. They also make you reread text conversations a hundred times, just because. They are fun and innocent and sometimes, if you are extra lucky, they can even lead to love.