You can tell if someone is chatting you up by the sound of their voice. Also by the questions they ask you. They also tend to keep a slouching posture and make eye contact with you.
Check browsing history if they haven't deleted it.
No, you should not tell a girl that you are in love with her while she has someone else. You need to wait until she is available.
Tell them you are already taken.'nuff said
simply tell the person you are in a relationship with that you are intrested in someone else and just be honest with them and tell them how you really feel.
Tell the guy you asked out that your sorry but you like someone else.
you cant get him to tell you get someone else
dont build any relations on hidden stuffs. clear it out and if he understands its good else there is someone else...
tell them to get over you and date someone else.
You should look for someone else to love.
Tell the person that you are crazy about them and tell them why, or else you'll regret not telling them
"sorry, i like someone else" sincerely.