Simply - body language
Advanced - Intuition!
Ask her.
tell them to get over you and date someone else.
Leave him alone and back off. He likes someone else.
Blondies aren't any different than other people. If you can tell when someone else likes you then you can tell when the blondie likes you
Tell the person that you are crazy about them and tell them why, or else you'll regret not telling them
Tell then how you feel, If that doesnt Work, Move on...
yes
get with another lad to try and make your crush jealous if it doesn't work then he likes someone else or get a friend to ask him if he likes someone and if he does tell your friend to ask him who he likes. if he doesn't like you then move on you can find somebody better then him, somebody that actually loves you.
you go to her house. meet her , tell her he loves you and she needs to find someone else
tell them theres someone else in your life. dont lead them on thinking theyre going to get to be with you.
If he gives you more attention than he does with the other girl, chances are he likes you more.
Well you really shouldn't! You should be happy that someone likes you. But if you feel like they are to close to you but you like someone else just say that you like someone else and tell them how you feel, and that you just wanna b friends.