A religious fruit nut friend?

I have a best friend with whom I grew up with and lately she has changed quite a bit and I mean ALOT. It is almost to the point where I really do not like discussing things with her about my life; she has since became a super devout Catholic and I grew up strict Catholic myself but it is becoming way too much. It's like cannot have a discussion anymore without Bible, religion or heavy Catholicism being brought up. Like I mentioned before how can I discuss with her gently that it is becoming way too overboard and I am a deeply religious person myself but it is border line fanaticism. So, how can I sort of discuss with her to bring it down like a HUGE amount?