Honestly? If she's trying to bully you into becoming an evangelical Christian, then she's not a very good person, let alone girlfriend. You can try sitting down with her and calmly explaining that you're not interested in joining a religion and that if she has a problem with that, maybe it's better that you're not together. If your partner can't respect your beliefs, then they're not a good partner and you'd be better off. Best of luck.

@Laughlin12345, how long have you and your girlfriend been in a relationship? Was she an evangelical Christian when you met?

If she is a "true Christian" she will agree that the man is the head of the household and the spiritual leader in the relationship, and will drop the subject.

Seriously, though, it does not sound like a healthy relationship. Do what you need to heal the relationship or, better yet, do what you need for YOU to be emotioanlly healthy, and if that means ending the relationship (and it probably does), then do it NOW, rather than increasing your suffering and inflating her hopes that you might convert.

Think about long term goals. How can you have a future rational conversation with an irrational partner?

Only you and you alone know how you feel about this. Your decision.