I'm going to make a girl cry because she wouldn't take no for an answer
How are you going to make her cry?
I'm going to yell at her when I tell her "no" again.
It is awful that she doesn't understand no, but you shouldn't make her cry. If people see they will think that you are bullying her.
She deserves it for being so pushy.
I understand why you're annoyed, but yelling at her and making her cry isn't the way to solve the problem. I think you should calmly explain to her that you're saying "no," and that if she doesn't want to accept it then that's her problem.