What do you do when you tell a girl you love her and she doesn't reply?

if you tell someone you love them and their is no response back then that means 1 they is undecided 2 they dont know what to say because they are confused 3 or if they wait along time to say i love you back then they dont really love you or if they don't say nothing at all they definetly don't love you. when you find true love you would know!