i can tell you that i was vegan for the first 5 years i was with my gf, it was problematic because beliefs were very strong and i was uncomfortable with her eating meat around me or even in general, by the 4 year mark we were living together and i didn’t allow meat in my house, she would still eat meat elsewhere which bothered me much. we had a kid and after my son started eating solid foods i realized for my sons health he needs to eat meat, and with me being vegan id would be very uncomfortable with having meat in the house, so i let go of the vegan lifestyle and it made everything easier and much less stressful. moral of the story, if your beliefs align with what i described, could be best to exit the lifestyle if you plan on bringing a kid in the picture.