Sure there is no harm in it.
there is still a chance he likes you and might like her at the same time. you should tell him you like him, it doesnt have to be in person it can be facebook or msn or anything like that, he might come to his senses and like you again. if not then he doesnt deserve you.
You can't really force someone to like you again. Why did that person stop liking you? If you know you might understand if they won't 'like' you again. If you don't then you will never know. All you have to do is continue being yourself, if they don't like you for who you are and how you act, then why would you want someone to like you for someone who you arn't?
You should hang out with that SECRET SOMEONE and slowly try and tell him. BE CAREFUL he might react thought but say if this is to weird then lets just be friends again.
It means you liked them the whole time (subconciously) and u should go out with him or her.
Wait, he might get over this girl.
be yourself, if they liked you befor they'll like you again.
You might as well go for it before someone else does.
You should just wait it out! They can't be together forever and if you think they might stay together forever just get over him ask a friend to set you up with someone else that might help.
He/She might show signs like he'she wants to talk to you and stuff. If he/she is engaged in doing things with you she might like you as friend or more than that!
she should talk to him as a friend and get to know him better and hang out w/ him. then even if they r not in a relationship than they can b friends and maybe he might change his mind or she might end up liking someone else
i think they should be able to because they might not see that person that they like again
You should tell your crush you like him/her eventually or else, your crush might find someone else they like you'll be heartbroken.