How to get my ex to stand up for our relationship against family

I need to know my ex girlfriend and i been fighting to get back together for a year now and her family lets us talk but wont ever let us be friends or date each other. She always keeps on leaving me for guys alot and doesnt really feel like she loves me so badly but if she could be with me she would but she wont unless her family lets her. They tell her im crazy and dangerous and i made mistakes i wish i could take back but all i want now is her. She wont ever be with me unless she is aloud too. Shes 22 and lives with her grandmother but her family controls her and she always says they tried to kill her amd etc and treat her wrong but shes afraid to be with me. is there any chance on her family letting us be together as friends or anything and what should she and i do? her family forced us to break up before and her grandmother secretly let us be together before and the whole family found out and didnt do anything about it and her grandmom hates me now and her and i secretly met a couple of times and didnt do anything about it because they cant. They lied and said cops were watching us and the police themselves told me they were not. Shes afraid of what they would do and agraid of getting kicked out of her house. But i figured all these signs are they cant and wont do anything about it as long as she loves me and leaves on her own when she has the time to see me they dont do anything about it. so should she just come and be with me and fight for us? please help? i belive her family wont and cant do anything because shes 22 and shes afriad of alot. Shes not fighting at all please help and give your advice and answers to help her and i on what to do