Having seen many examples of the disaster it becomes when a member spouse pushes, coerces, ultimatums the non-member spouse into being baptized, I have very assiduously steered clear of those methods from the start.
If you are dating a Mormon girl, then always wear a good shirt, jeans or pants, and avoid T-shirts with offensive wording or graphics. Modest dressing is the best policy here.
It sounds like she's already considered marrying you and raising children in the church even with you being out of the church. You should start raising CES letter issues with her and see how she handles it.
I'm a nevermo, but I married a then TBM girl, so maybe my perspective will be of help to you. The first key question to as is: If the answer is yes then the relationship sounds like it's doomed.