Literally fucks with your brain and can't get him/her out of your head. Someone you are most likely never going to be with cuz you're too shy to talk to. SO TALK TO THEM
A crush is someone you really like, and by really, I mean REALLY. You try to spend as much time as you can with them, and you feel a different feeling when they are around.
You also find yourself looking at them often because you cannot get over how attractive they are.
Crushes can make you feel many ways, but it's the best feeling because you feel like the world is bright, and the only thing that matters now is your crush.
Person 1:Why has she been staring at John so much..
Person 2:I think she has a crush on him..
Person 1:Yeah, well that's so obvious.