Tibit: How do you know if he or she likes you?

For more details: http://www.wikihow.com/Know-if-a-Guy-Likes-You
                          http://www.wikihow.com/Know-if-a-Girl-Likes-You

There is no 100% guarentee this is correct. If you really want to know, ask the person yourself. & Have fun reading the links provided if your free. 
You'll never know if your crush likes you. And, once you confirm, don't wait. Never let the chance slip past! Hehe :)