Take this experience advice or not.
Ask her why she doesn't like your family. Press for details.
Then consider this. You've known your family all your life and in the end they're there through thick and thin. While women come and go.
A woman that doesn't like your family at the g/f fiance stage, will ultimately make you choose them or her if you marry.
Maybe this is God's way of telling you, through her, that she's not the one.
The woman that God made for you loves the family that made you come into this world so that you could find one another.