they both have to be about the same age and one has to be a boy and the other a girl. then you have to give each other presents,play games and visit each other alot and when you have two smileies and two hearts keep working 'cause that means there best friends. :furawatchi: hope i helped!
If it's all perfectly set up, same age, same stage, different gender - then just keep trying, I'm sure they'll fall in love in no time. True Tama-love!