I can't stop thinking about my crush. What should I do?

Talk to him/her. It helps a lot. And you will be able to know right away if they are interested in furthering a reality with you.

Keep yourself busy. Do whatever makes you happy that doesn't involve him. Talk to friends. Get a happy crush (Like Channing Tatum then make a shrine for Channing Tatum. Lol. I kid)

Try keeping yourself busy. Spending time with family and friends, exercising, reading, anything thats keeps you up and moving and talking try it. If your feeling bold just go talk to your crush already! They wont bite.

it cud be a good thing to tell him or her how you feel but some people don't want to do that. distract yourself is the only thing I can think of.

Next time you think about your crush think about whether or not your compatible and if they feel the same about you.

You should talk to him, if you want to know him better and get him. If you 2 had an unpleasant past and you are trying to stop thinking about him, you should try some activities like hanging out with friends, doing sports, reading, and trying to meet new people and have fun!!

You have to engage your self in some useful work to get over him or you can consult a doctor for this

talk to them!! tell them how you feel! be honest with them!! I'm sure they'll be flattered and who knows - maybe they like you back!

It's a good thing if that keeps you moving forward and bad if it held you back. You can't do anything about it. It's human nature to know someone and fell in love in the process. Just keep yourself occupied. :)

Take action! If he/she doesn't know then go for it. Approach them first casually and start to create chances to get to know them. It doesn't have to be a one-on-one date you're too nervous, you can hang out with them in group activities too. If for any reason, you want to get over your crush, try to stay away from them, and maybe even unfollow them on social media for now, and your feelings will go away by themselves. Don't stalk your crush in whatever cases -- it's creepy!