About seperating minor girl from his love and study..

Sir, A girl living in another state is fully torched by a boy who loves her, but the girl doesn't love him and instead of him she loves me.... This thing harmed that boy, that's why that boy has taken all her devices and account through she can contact me or someone else... Most importantly that girl has no one like his father, mother and any other siblings... She just has her grandparents who doesn't care her and left her alone in that city... The boy wants that girl to live with her all her life, seperate from everybody, that too without that girl's permission... The girl is soo much kind that she do all things that the boy wants in return of that he will do nothing... I whom she love, doing everything to save her and her life... Girl is very intelligent in studies but there not a single family member takes care of her and everyone behaves curialy with her... From past somedays the boy has threated me that he will take that girl somewhere away in absence of her grandparents... He has taken all her contact from where I could contact.. That boy's parents also doesn't care about it and they went somewhere else to leave and left this bot here to study... But instead of study that boy is doing this kind of thinks... When I tried to threaten him by police, he simply said they can't do anything to me.. I thousands times tried to make him understand that plz leave that girl and let her live his life by her own choice and will.. But he is just threatening me to be get side... Now what I do, i have nothing to contact that girl, and doesn't know where the girl Is with here grandparents orr somewhere else.. nearly she is missing.. ( I won't tell my identity or someone else's, i just want an advice from u)