what should you do if your girlfriend is not converted?
then convert her.
that may seem a little bit distasteful, but trust me, a non-Christian partner becomes a stumbling block to any true Christian
you may say, "but I love her, and I love her for the way she is right now, I don't want to force anything on her"
if you say that, then son, you are loving her more than you are loving God. ... don't.