Partner had a deep religious transformation during relationship and struggle to make sense of it
I'm looking for perspective from people who have experienced something similar.
I was in a relationship with someone who was kind, thoughtful, open-minded, emotionally intelligent, and someone I genuinely believed I'd spend my life with. When we first met they told me their family was Catholic, but that they weren’t really practicing. We had conversations about children, and the kind of family we wanted to build. I always felt incredibly safe and loved with this person.
About halfway through our relationship, they started becoming much more involved in Catholicism. At first, I was supportive because I thought exploring faith was a positive thing esp since they grew up in a Catholic family. Over the following months, they became increasingly devoted, and by the end of our relationship they were attending church everyday. Their worldview also became much more rigid, and eventually it became clear that our future together no longer aligned.
What has been hardest for me is that this felt like a complete shift in values. Earlier in our relationship, we had talked about accepting our future children for whoever they became and embracing uncertainty in life. Later, it felt like there was only one acceptable path for how a family should look and what children should believe.
The relationship ultimately ended because they felt they needed a partner who shared that same framework.
I'm not here to criticize Catholicism. I'm genuinely trying to understand how someone can seem so open-minded and accepting, then become so certain that they end a loving relationship over beliefs they didn't seem to hold before.
Has anyone experienced a partner going through a major religious transformation like this? Did it feel like they became a different person, or did you eventually realize those beliefs had always been there? How did you stop trying to reconcile the person you fell in love with and the person they eventually became?
I'm also curious if anyone has experienced this with someone who seemed to become increasingly uncomfortable with uncertainty and started viewing life in much more black-and-white terms. Was that just part of the conversion process, or did you feel there was something else going on?