How to persuade my girl to get a restraining order against a guy bothering her?

I have come to the conclusion that getting a restraining order would be the best course of action as he just won’t stop flirting with her. The problem is, she is too shy to turn him down directly, he won’t listen to me, and she thinks its not that bad. Yet that is. Because with dudes like him, its always going to get worse. I know how his type is. He is the type of womanizer who flirts with taken girls, and probably would cheat too. I’m her future boyfriend, so how can I convince her to get that restraining order before the other guy goes from bad to really bad?

How to persuade my girl to get a restraining order against a guy bothering her?
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