What is my duty towards a girl who asked for help to distance herself from a non-Muslim young man and draw closer to her religion?

Distancing oneself from foreigners is a religious obligation, and this is emphasized if they are disbelievers, especially for a girl who is attached to a disbeliever, because it is not permissible for her to marry him. Therefore, she must be helped to distance herself from him and to adhere to her religion, by using permissible means such as your wife or one of your mahram communicating with her, lending her useful religious materials, encouraging her to associate with committed Muslim women, and urging her to seek marriage with someone whose religiosity and character are pleasing, while also seeking assistance through prayer.