[In response to the OP who recently broke up with his gf, in part because she was not interested in converting to Christianity. They still live together, and OP is afraid she will hate God for their break-up.]

[...]

Their of the world, just like anyone that is not in Christ. Things may seem to look great now (or then) but that is most likely to change, especially when she really tries to start changing you. After a "break up" is the most volatile time, I'd be less worried about her hating God (as the bible says they already do) rather than she grabbing a hammer in the middle of the night and taking it at you. Even after knowing someone for years, you never really know what they are capable of, and for non-believers that can easily be controlled by demonic powers, it can lead to anything.